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A secondary forest (or second-growth forest) is a forest or woodland area which has regenerated through largely natural processes after human-caused disturbances, such as timber harvest or agriculture clearing, or equivalently disruptive natural phenomena. It is distinguished from an old-growth forest (primary or primeval forest), which has not recently undergone such disruption, and complex early seral forest, as well as third-growth forests that result from harvest in second growth forests. Secondary forest regrowing after timber harvest differs from forest regrowing after natural disturbances such as fire, insect infestation, or windthrow because the dead trees remain to provide nutrients, structure, and water retention after natural disturbances. Secondary forests are notably different from primary forests in their composition and biodiversity; however, they may still be helpful in providing habitat for native species, preserving watersheds, and restoring connectivity between ecosystems. (Full article...) Multilaminar wood veneer uses plantation wood to reproduce decorative effects that are typical of quality wood species (often protected and rare). This aids the preservation of biodiversity and complies with the principles of sustainable forest management. In this veneering process, large sheets of veneer are produced on a machine similar to a lathe. These are dyed, spread with suitable adhesives, and then compressed and bonded into thick (typically 70 cm) logs, which are then sliced to create the end product. If the sheets are compressed between platens with an undulating surface, the slice will cross several layers to produce a patterned effect. Many different designs can be obtained by varying the platens, the dyes and the stacking order. Although the product may be considered sustainable, multilaminar veneer does have a relatively high carbon footprint due to the numerous dyeing, laminating, pressing, and slicing operations. (Full article...) Biodiversity (or biological diversity) is the variety and variability of life on Earth. It can be measured on various levels. There is for example genetic variability, species diversity, ecosystem diversity and phylogenetic diversity. Diversity is not distributed evenly on Earth. It is greater in the tropics as a result of the warm climate and high primary productivity in the region near the equator. Tropical forest ecosystems cover less than one-fifth of Earth's terrestrial area and contain about 50% of the world's species. There are latitudinal gradients in species diversity for both marine and terrestrial taxa. Since life began on Earth, six major mass extinctions and several minor events have led to large and sudden drops in biodiversity. The Phanerozoic aeon (the last 540 million years) marked a rapid growth in biodiversity via the Cambrian explosion. In this period, the majority of multicellular phyla first appeared. The next 400 million years included repeated, massive biodiversity losses. Those events have been classified as mass extinction events. In the Carboniferous, rainforest collapse led to a great loss of plant and animal life. The Permian–Triassic extinction event, 251 million years ago, was the worst; vertebrate recovery took 30 million years. The most recent, the Cretaceous–Paleogene extinction event, occurred 65 million years ago. This period has attracted more attention than others because it resulted in the extinction of the non-avian dinosaurs. Human activities have lead to an ongoing biodiversity loss and an accompanying loss of genetic diversity. This process is often referred to as Holocene extinction, or sixth mass extinction. For example, it was estimated in 2007 that up to 30% of all species will be extinct by 2050. Destroying habitats for farming is a key reason why biodiversity is decreasing today. Climate change also plays a role. This can be seen for example in the effects of climate change on biomes. (Full article...) Environmental governance is a concept in environmental policy that steers markets, technology and society towards sustainability. It considers social, economic and environmental aspects of its policies. Brazil is currently developing very fast rate, only out-performed by countries such as China and India, both in terms of economic growth and its recovery rate after the global financial crisis in the late 2000s. The saying that “Brazil is the country of the future...and it always will be” has haunted Brazil for decades. But economic policy changes made since the founding of the New Republic have allowed Brazil to gain international confidence. American President Barack Obama stated that “The people of Brazil should know that the future has arrived” during a visit to Rio de Janeiro in March 2011. Brazil is no longer referred to as a developing country, but as an emerging country, a newly industrialised country (NIC) and a member of the BRIC economies. But with this growth rate comes huge responsibility in terms of sustainability. Brazil's economic growth is supported by the huge demand for natural resources from China, resources that Brazil has in abundance. Brazil is currently successfully matching the needs of China's manufacturing industry and with huge investments currently being made to sustain this demand from China, Brazil is building new ports and airports and increasing the capacity of its current ones. The extraction of natural resources is coming at a price for the natural environment. Former Environment Minister Marina Silva resigned in 2008 as she felt the Brazilian government was prioritizing the interests of big businesses and the economy, and felt she was fighting a losing battle to protect l Brazil's environment, including the Amazon rainforest. Despite these claims, Brazil has been praised for its environmental sustainability efforts and attempts to reduce its carbon emissions. The Brazilian government created the Ministry of the Environment (MMA) in 1985 and following this, organisations such as IBAMA, created in 1989, work to protect the natural environment. Brazil has also taken a front seat with regards to global environmental governance by jointly creating and presiding over the Megadiverse Like-Minded Countries Group, which includes 70% of the world's living biodiversity and 45% of the world's population. (Full article...) Forest inventory is the systematic collection of data and forest information for assessment or analysis. An estimate of the value and possible uses of timber is an important part of the broader information required to sustain ecosystems. When taking forest inventory the following are important things to measure and note: species, diameter at breast height (DBH), height, site quality, age, and defects. From the data collected one can calculate the number of trees per acre, the basal area, the volume of trees in an area, and the value of the timber. Inventories can be done for other reasons than just calculating the value. A forest can be cruised to visually assess timber and determine potential fire hazards and the risk of fire. The results of this type of inventory can be used in preventive actions and also awareness. Wildlife surveys can be undertaken in conjunction with timber inventory to determine the number and type of wildlife within a forest. The aim of the statistical forest inventory is to provide comprehensive information about the state and dynamics of forests for strategic and management planning. Merely looking at the forest for assessment is called taxation. (Full article...) The Coalition for Rainforest Nations (CfRN) is an intergovernmental organization established by forested tropical countries to collaboratively reconcile forest stewardship with economic development. The Rainforest Coalition aims to bring together both developing and industrialized nations for the purpose of creating community-driven, environmentally sustainable growth. The primary strategy of the Coalition is to bring about the reform of international frameworks, both legal and economic, to correct market failures that result in unsustainable outcomes, and to create economic incentives for the preservation of areas of high biodiversity and endemism worldwide. The Coalition supports the Forests Now Declaration calling for changes in the Kyoto Protocol and other international carbon markets to include land use and forestry. The Coalition has been instrumental in the establishment of the World Bank's Forest Carbon Partnership Facility and the United Nations' UN-REDD program. Further, based upon these efforts by the Coalition, various industrialized countries (including Norway, the UK, Germany, France, Japan, Australia, Finland, and others) have currently pledged around US$3.0 billion for capacity building and incentives to reduce rates of deforestation in participating developing countries. (Full article...) Environmental history is the study of human interaction with the natural world over time, emphasising the active role nature plays in influencing human affairs and vice versa. Environmental history first emerged in the United States out of the environmental movement of the 1960s and 1970s, and much of its impetus still stems from present-day global environmental concerns. The field was founded on conservation issues but has broadened in scope to include more general social and scientific history and may deal with cities, population or sustainable development. As all history occurs in the natural world, environmental history tends to focus on particular time-scales, geographic regions, or key themes. It is also a strongly multidisciplinary subject that draws widely on both the humanities and natural science. The subject matter of environmental history can be divided into three main components. The first, nature itself and its change over time, includes the physical impact of humans on the Earth's land, water, atmosphere and biosphere. The second category, how humans use nature, includes the environmental consequences of increasing population, more effective technology and changing patterns of production and consumption. Other key themes are the transition from nomadic hunter-gatherer communities to settled agriculture in the Neolithic Revolution, the effects of colonial expansion and settlements, and the environmental and human consequences of the Industrial and technological revolutions. Finally, environmental historians study how people think about nature – the way attitudes, beliefs and values influence interaction with nature, especially in the form of myths, religion and science. (Full article...) The International Union of Forest Research Organizations (IUFRO) (French: Union Internationale des Instituts de Recherches Forestières, German: Internationaler Verband Forstlicher Forschungsanstalten, Spanish: Unión Internacional de Institutos de Investigación Forestal) is a non-profit, non-governmental international network of forest scientists, headquartered in Austria. In 2019, IUFRO counted 630 Member Organizations worldwide. (Full article...) The French National School of Forestry (École nationale des eaux et forêts, or National School of Water Resources and Forestry), established in Nancy, France, in 1824, was the first national training institute for foresters in France, and a premier early school of forestry in Europe and globally. In 1964, it was merged into the National School of Rural Engineering, Water Resources and Forestry (École nationale du génie rural, des eaux et des forêts, or ENGREF), which in turn became part of AgroParisTech (Institut des sciences et industries du vivant et de l’environnement, or Paris Institute of Technology for Life, Food and Environmental Sciences) in 2006. (Full article...) In forestry, periodic annual increment (PAI) is the change in the size of a tree between the beginning and ending of a growth period, divided by the number of years that was designated as the growing period. For sigmoid growth, the graph of PAI increases rapidly and then quickly declines, approaching zero. PAI may go negative if a tree loses volume due to damage or disease. Periodic annual increment is commonly used instead of current annual increment as a basis for computing growth per cent. Growth per cent indicates the rate of increase with relation to the wood capital required for its production, this is usually based on a single year's growth. (Full article...) Tree planting is the process of transplanting tree seedlings, generally for forestry, land reclamation, or landscaping purposes. It differs from the transplantation of larger trees in arboriculture and from the lower-cost but slower and less reliable distribution of tree seeds. Trees contribute to their environment over long periods of time by providing oxygen, improving air quality, climate amelioration, conserving water, preserving soil, and supporting wildlife. During the process of photosynthesis, trees take in carbon dioxide and produce the oxygen we breathe. In silviculture, the activity is known as "reforestation", or "afforestation," depending on whether the area being planted has recently been forested or not. It involves planting seedlings over an area of land where the forest has been harvested or damaged by fire, disease, or human activity. Tree planting is carried out in many different parts of the world, and strategies may differ widely across nations and regions and among individual reforestation companies. Tree planting is grounded in forest science and, if performed properly, can result in the successful regeneration of a deforested area. Reforestation is the commercial logging industry's answer to the large-scale destruction of old-growth forests, but a planted forest rarely replicates the biodiversity and complexity of a natural forest. Because trees remove carbon dioxide from the air as they grow, tree planting can be used to help limit climate change. Desert greening projects are also motivated by improved biodiversity and reclamation of natural water systems, as well as improved economic and social welfare due to an increased number of jobs in farming and forestry. (Full article...) Taiga (/ˈtaɪɡə/; Russian: тайга́), also known as boreal forest or snow forest, is a biome characterized by coniferous forests consisting mostly of pines, spruces, and larches. The taiga or boreal forest is the world's largest land biome. In North America, it covers most of inland Canada, Alaska, and parts of the northern contiguous United States. In Eurasia, it covers most of Sweden, Finland, much of Russia from Karelia in the west to the Pacific Ocean (including much of Siberia), much of Norway and Estonia, some of the Scottish Highlands, some lowland/coastal areas of Iceland, and areas of northern Kazakhstan, northern Mongolia, and northern Japan (on the island of Hokkaidō). The principal tree species, depending on the length of the growing season and summer temperatures, vary across the world. The taiga of North America is mostly spruce; Scandinavian and Finnish taiga consists of a mix of spruce, pines and birch; Russian taiga has spruces, pines and larches depending on the region; and the Eastern Siberian taiga is a vast larch forest. Taiga in its current form is a relatively recent phenomenon, having only existed for the last 12,000 years since the beginning of the Holocene epoch, covering land that had been mammoth steppe or under the Scandinavian Ice Sheet in Eurasia and under the Laurentide Ice Sheet in North America during the Late Pleistocene. Although at high elevations taiga grades into alpine tundra through Krummholz, it is not exclusively an alpine biome, and unlike subalpine forest, much of taiga is lowlands. The term "taiga" is not used consistently by all cultures. In the English language, "boreal forest" is used in the United States and Canada in referring to more southerly regions, while "taiga" is used to describe the more northern, barren areas approaching the tree line and the tundra. Hoffman (1958) discusses the origin of this differential use in North America and how this differentiation distorts established Russian usage. Climate change is a threat to taiga, and how the carbon dioxide absorbed or emitted should be treated by carbon accounting is controversial. (Full article...) Line plot survey is a systematic sampling technique used on land surfaces for laying out sample plots within a rectangular grid to conduct forest inventory or agricultural research. It is a specific type of systematic sampling, similar to other statistical sampling methods such as random sampling, but more straightforward to carry out in practice. This survey methodology is typically used to collect information about seedlings, shrubs, invasive species, signs of wildlife, need for fertilization, timber species count, and other similar types of data. For statistical control, all sample plots are a precise radius, typically 4 to 8 feet (120 to 240 cm), and must not include features outside each sampling circle. (Full article...) The International Union for Conservation of Nature (IUCN) is an international organization working in the field of nature conservation and sustainable use of natural resources. Founded in 1948, IUCN has become the global authority on the status of the natural world and the measures needed to safeguard it. It is involved in data gathering and analysis, research, field projects, advocacy, and education. IUCN's mission is to "influence, encourage and assist societies throughout the world to conserve nature and to ensure that any use of natural resources is equitable and ecologically sustainable". Over the past decades, IUCN has widened its focus beyond conservation ecology and now incorporates issues related to sustainable development in its projects. IUCN does not itself aim to mobilize the public in support of nature conservation. It tries to influence the actions of governments, business and other stakeholders by providing information and advice and through building partnerships. The organization is best known to the wider public for compiling and publishing the IUCN Red List of Threatened Species, which assesses the conservation status of species worldwide. IUCN has a membership of over 1,400 governmental and non-governmental organizations from over 170 countries. Some 16,000 scientists and experts participate in the work of IUCN commissions on a voluntary basis. It employs over 900 full-time staff in more than 50 countries. Its headquarters are in Gland, Switzerland. Every four years, IUCN convenes for the IUCN World Conservation Congress where IUCN Members set the global conservation agenda by voting on recommendations and guide the Secretariat's work by passing resolutions and the IUCN Programme. IUCN has observer and consultative status at the United Nations, and plays a role in the implementation of several international conventions on nature conservation and biodiversity. It was involved in establishing the World Wide Fund for Nature and the World Conservation Monitoring Centre. In the past, IUCN has been criticized for placing the interests of nature over those of indigenous peoples. In recent years, its closer relations with the business sector have caused controversy. IUCN was established in 1948. It was initially called the International Union for the Protection of Nature (1948–1956) and has also been formerly known as the World Conservation Union (1990–2008). (Full article...) Interception refers to precipitation that does not reach the soil, but is instead intercepted by the leaves, branches of plants and the forest floor. It occurs in the canopy (i.e. canopy interception), and in the forest floor or litter layer (i.e. forest floor interception ). Because of evaporation, interception of liquid water generally leads to loss of that precipitation for the drainage basin, except for cases such as fog interception, but increase flood protection dramatically, Alila et al., (2009). Intercepted snowfall does not result in any notable amount of evaporation, and most of the snow falls off the tree by wind or melts. However, intercepted snow can more easily drift with the wind, out of the watershed. Conifers have a greater interception capacity than hardwoods. Their needles gives them more surface area for droplets to adhere to, and they have foliage in spring and fall, therefore interception also depends on the type of vegetation in a wooded area. Mitscherlich in 1971 calculated the water storage potential as interception values for different species and stand densities. A storm event might produce 50 – 100 mm of rainfall and 4 mm might be the maximum intercepted in this way. Grah and Wilson in 1944 did sprinkling experiments where they watered plants to see how much of the intercepted is kept after watering stops. Trees like Norway maple and a small-leaved lime have an interception of approximately 38% of the gross precipitation in temperate climate. The interception depends on the leaf area index and what kind of leaves they are. Interception may increase erosion or reduce it depending on the throughfall effects. (Full article...) Close to nature forestry is a forest management approach treating forest as an ecological system (ecosystem) performing multiple functions. It is developing in the peri-alpine coutries of Europe (such as Switzerland, France, Germany and Slovenia) for more than 70 years, based on certain sustainable forest management practices from the late 19th century. Close to nature silviculture tries to achieve the management objectives with minimum necessary human intervention aimed at accelerating the processes that nature would do by itself more slowly. It works with natural populations of trees, ongoing processes and existing structures using cognitive approach, as in the case of so called (individual or group) selection forest (German: Plenterwald) or other types of uneven-aged forests. Its theory and practice takes forest as a self regulating ecosystem and manages it as such. It aims at overcoming the divorce between forester and ecologist. As an important consequence, it concludes that if properly applied, it would render the segregation of forest lands into "productive" and "protected" unnecessary. (Full article...) The idea of an international organization for food and agriculture emerged in the late 19th and early 20th century, advanced primarily by Polish-born American agriculturalist and activist David Lubin. In May–June 1905, an international conference was held in Rome, Italy, which led to the creation of the International Institute of Agriculture (IIA) by the King of Italy, Victor Emmanuel III. The IIA was the first intergovernmental organization to deal with the problems and challenges of agriculture on a global scale. It worked primarily to collect, compile, and publish data on agriculture, ranging from output statistics to a catalog of crop diseases. Among its achievements was the publication of the first agricultural census in 1930. World War II effectively ended the IIA. During the war, in 1943, United States President Franklin D. Roosevelt called a League of Nations Conference on Food and Agriculture, which brought representatives from forty-four governments to The Omni Homestead Resort in Hot Springs, Virginia, from 18 May to 3 June to attend the Hot Springs Conference. The main impetus for the conference was the British-born Australian economist Frank L. McDougall, who since 1935 had advocated for an international forum to address hunger and malnutrition. The Conference ended with a commitment to establish a permanent organization for food and agriculture, which was achieved on 16 October 1945 in Quebec City, Canada, following the Constitution of the Food and Agriculture Organization. The first session of the FAO Conference began the same day in the Château Frontenac in Quebec City and ended on 1 November 1945. This was led by Sir John Boyd Orr where his work on ending world hunger and creation of FAO resulted in him winning the Nobel Peace Prize in 1949. After the war, the IIA was officially dissolved by resolution of its Permanent Committee on 27 February 1948. Its functions, facilities, and mandate were then transferred to the newly established FAO, which maintained its headquarters in Rome. The FAO's initial functions supported agricultural and nutrition research and provided technical assistance to member countries to boost production in agriculture, fishery, and forestry. Beginning in the 1960s, it focused on efforts to develop high-yield strains of grain, eliminate protein deficiency, promote rural employment, and increase agricultural exports. The FAO recognized the decrease of these resources as an urgent problem in 1961 and created a joint collaboration with the International Biological Program (IBP) in 1967. To that end, it joined the UN General Assembly in creating the UN World Food Programme, the largest humanitarian organization addressing hunger and promoting food security. The FAO launched what would become the FAO Money and Medals Programme (MMP) in 1968. FAO issued collector art medals in various series to bring attention to FAO's goals and missions. This program was responsible for over a hundred medal designs issued to the collecting public. A thirtieth anniversary medal of the MMP was issued in 1998. In 1974, in response to famine in Africa, the FAO convened the first World Food Summit to address widespread hunger, malnutrition, and food insecurity. The meeting resulted in a proclamation that "every man, woman, and child has the inalienable right to be free from hunger and malnutrition to develop their physical and mental faculties" and a global commitment to eradicate these issues within a decade. A subsequent summit in 1996 addressed the shortcomings in achieving this goal while establishing a strategic plan for eliminating hunger and malnutrition into the 21st century. Every year, FAO publishes a number of major 'State of the World' reports related to food, agriculture, forestry, fisheries and natural resources. (Full article...) Károly Bund (4 June 1869 – 16 May 1931) was a Hungarian professional forestry engineer and an early environmentalist, serving as executive secretary of Hungary's National Forestry Association (Országos Erdészeti Egyesület), from 1900 until his death. (Full article...)

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Turpentine (which is also called spirit of turpentine, oil of turpentine, terebenthine, terebenthene, terebinthine and, colloquially, turps) is a fluid obtained by the distillation of resin harvested from living trees, mainly pines. Principally used as a specialized solvent, it is also a source of material for organic syntheses. Turpentine is composed of terpenes, primarily the monoterpenes alpha- and beta-pinene, with lesser amounts of carene, camphene, limonene, and terpinolene. Substitutes include white spirit or other petroleum distillates – although the constituent chemicals are very different. (Full article...) Sir Wilhelm Philipp Daniel Schlich KCIE FRS FLS (28 February 1840 in Flonheim – 28 September 1925 in Oxford), also known as William Schlich, was a German-born forester who worked extensively in India for the British administration. As a professor at Cooper's Hill, he influenced colonial forestry across the British colonies. His major work was a five volume Manual of Forestry (1889-96). (Full article...) Tropical and subtropical coniferous forests are a tropical forest habitat type defined by the World Wide Fund for Nature. These forests are found predominantly in North and Central America and experience low levels of precipitation and moderate variability in temperature. Tropical and subtropical coniferous forests are characterized by diverse species of conifers, whose needles are adapted to deal with the variable climatic conditions. Most tropical and subtropical coniferous forest ecoregions are found in the Nearctic and Neotropical realms, from Mexico to Nicaragua and on the Greater Antilles, Bahamas, and Bermuda. Other tropical and subtropical coniferous forests ecoregions occur in Asia. Mexico harbors the world's richest and most complex subtropical coniferous forests. The conifer forests of the Greater Antilles contain many endemics and relictual taxa. Many migratory birds and butterflies spend winter in tropical and subtropical conifer forests. This biome features a thick, closed canopy which blocks light to the floor and allows little underbrush. As a result, the ground is often covered with fungi and ferns. Shrubs and small trees compose a diverse understory. (Full article...) A hand compass (also hand bearing compass or sighting compass) is a compact magnetic compass capable of one-hand use and fitted with a sighting device to record a precise bearing or azimuth to a given target or to determine a location. Hand or sighting compasses include instruments with simple notch-and-post alignment ("gunsights"), prismatic sights, direct or lensatic sights, and mirror/vee (reflected-image) sights. With the additional precision offered by the sighting arrangement, and depending upon construction, sighting compasses provide increased accuracy when measuring precise bearings to an objective. The term hand compass is used by some in the forestry and surveying professions to refer to a certain type of hand compass optimized for use in those fields, also known as a forester or cruiser compass. A hand compass may also include the various one-hand or 'pocket' versions of the surveyor's or geologist's transit. (Full article...) A geographic information system (GIS) consists of integrated computer hardware and software that store, manage, analyze, edit, output, and visualize geographic data. Much of this often happens within a spatial database, however, this is not essential to meet the definition of a GIS. In a broader sense, one may consider such a system also to include human users and support staff, procedures and workflows, the body of knowledge of relevant concepts and methods, and institutional organizations. The uncounted plural, geographic information systems, also abbreviated GIS, is the most common term for the industry and profession concerned with these systems. It is roughly synonymous with geoinformatics. The academic discipline that studies these systems and their underlying geographic principles, may also be abbreviated as GIS, but the unambiguous GIScience is more common. GIScience is often considered a subdiscipline of geography within the branch of technical geography. Geographic information systems are utilized in multiple technologies, processes, techniques and methods. They are attached to various operations and numerous applications, that relate to: engineering, planning, management, transport/logistics, insurance, telecommunications, and business. For this reason, GIS and location intelligence applications are at the foundation of location-enabled services, which rely on geographic analysis and visualization. GIS provides the capability to relate previously unrelated information, through the use of location as the "key index variable". Locations and extents that are found in the Earth's spacetime are able to be recorded through the date and time of occurrence, along with x, y, and z coordinates; representing, longitude (x), latitude (y), and elevation (z). All Earth-based, spatial–temporal, location and extent references should be relatable to one another, and ultimately, to a "real" physical location or extent. This key characteristic of GIS has begun to open new avenues of scientific inquiry and studies. (Full article...) The Royal Saxon Academy of Forestry (German: Königliche-Sächsische Forstakademie) in Tharandt, Saxony, near Dresden, was founded by silviculturist Heinrich Cotta in 1811. Established in conjunction with the school, and later integrated with it, was the Forstbotanischer Garten Tharandt, one of the oldest arboreta in the world. Its legacy lives on today as a campus of the Dresden University of Technology and site of that institution's Department of Forestry. (Full article...) The International Tropical Timber Agreement (ITTA), 1983) is an agreement to provide an effective framework for cooperation between tropical timber producers and consumers and to encourage the development of national policies aimed at sustainable utilization and conservation of tropical forests and their genetic resources. The International Tropical Timber Organization was established under this agreement, which first opened for signature on 18 November 1983, then Entered into force on 1 April 1985. There were subsequent treaties, with an increasing number of signatories, in 1994 (ITTA2) and 2006 (ITTA3). ITTA2 (1994) was drafted to ensure that by the year 2000 exports of tropical timber originated from sustainably managed sources and to establish a fund to assist tropical timber producers in obtaining the resources necessary to reach this objective. It further defined the mandate of the International Tropical Timber Organization. The agreement was opened for signature on 26 January 1994, and entered into force on 1 January 1997. ITTA3 (2006) aimed to "promote the expansion and diversification of international trade in tropical timber from sustainably managed and legally harvested forests and to promote the sustainable management of tropical timber producing forests". It entered into force on 7 December 2011. (Full article...) Selection cutting, also known as selection system, is the silvicultural practice of harvesting trees in a way that moves a forest stand towards an uneven-aged or all-aged condition, or 'structure'. Using stocking models derived from the study of old growth forests, selection cutting, also known as 'selection system', or 'selection silviculture', manages the establishment, continued growth and final harvest of multiple age classes (usually three, but 5 or even 10 are possible) of trees within a stand. A closely related approach to forest management is Continuous Cover Forestry (CCF), which makes use of selection systems to achieve a permanently irregular stand structure. Selection cutting or systems are generally considered to be more challenging to implement and maintain than even-aged management, due to the difficulty of managing multiple age classes in a shared space, but there are significant ecological benefits associated with it. Uneven-aged stands generally exhibit higher levels of vertical structure (key for many species of birds and mammals), have higher levels of carbon sequestration, and produce a more constant flow of market and non-market forest resources than even-aged stands. Although a forest composed of many stands with varied maturity ages maybe comparable, this would be at the forest rather than the stand level. This silvicultural method also protects forest soils from the adverse effects of many types of even-aged silviculture, including nutrient loss, erosion and soil compaction and the rapid loss of organic material from a forested system. Selection silviculture is especially adept at regenerating shade-tolerant species of trees (those able to function under conditions of low solar energy, both cooler and less light), but can also be modified to suit the regeneration and growth of intolerant and mid-tolerant species. This is one of many different ways of harvesting trees. Selection cutting as a silvicultural system can be modified in many ways and would be so done be a forester to take into account varied ownership goals, local site conditions and the species mix found from past forest conditions. (Full article...) Tree taper is the degree to which a tree's stem or bole decreases in diameter as a function of height above ground. Within Forestry and for the purposes of timber production, trees with a high degree of taper are said to have poor form, while those with low taper have good form. The opposite is the case for open-grown amenity trees. The form of a tree is sometimes quantified by the Girard form class, which is the ratio, expressed as a percentage, of the butt-log scaling diameter to diameter at breast height. Taper is often represented by mathematical functions fitted to empirical data, called taper equations. One such function, attributed to Ormerod, is $d(h)^{2}={D^{2}}\left({H-h \over H-h_{b}}\right)^{1.6}$ where: $d(h)$ = stem diameter at height h, $D$ = tree diameter at breast height, $H$ = tree total height, $h$ height of interest (h ≤ H), and $h_{b}$ = breast height. Once developed, taper equations can be used to predict the diameter at a given height, or the height for a given diameter. (Full article...) Ecological restoration, or ecosystem restoration, is the process of assisting the recovery of an ecosystem that has been degraded, damaged, or destroyed. It is distinct from conservation in that it attempts to retroactively repair already damaged ecosystems rather than take preventative measures. Ecological restoration can reverse biodiversity loss, combat climate change, and support local economies. Habitat restoration involves the deliberate rehabilitation of a specific area to reestablish a functional ecosystem. To achieve successful habitat restoration, it's essential to understand the life cycles and interactions of species, as well as the essential elements such as food, water, nutrients, space, and shelter needed to support species populations. When it's not feasible to restore habitats to their original size or state, designated areas known as wildlife corridors can be established. These corridors connect different habitats and open spaces, facilitating the survival of species within human-dominated landscapes. For instance, marshes serve as critical stopover sites for migratory birds, wildlife overpasses enable animals to safely cross over highways, and protected riparian zones within urban settings provide necessary refuges for flora and fauna. The United Nations named 2021-2030 the Decade on Ecosystem Restoration. Scientists estimate that the current species extinction rate, or the rate of the Holocene extinction, is 1,000 to 10,000 times higher than the normal, background rate. Habitat loss is a leading cause of species extinctions and ecosystem service decline. Two methods have been identified to slow the rate of species extinction and ecosystem service decline: conservation of quality habitat and restoration of degraded habitat. The number and size of ecological restoration projects have increased exponentially in recent years. Restoration goals reflect political choices, and restoration goals differ by place and culture. (Full article...) The Indian Forest Act, 1927 was largely based on previous Indian Forest Acts implemented under the British. The most famous one was the Indian Forest Act of 1878. Both the 1878 act and the 1927 act sought to consolidate and reserve the areas having forest cover, or significant wildlife, to regulate movement and transit of forest produce, and duty leviable on timber and other forest produce. It also defines the procedure to be followed for declaring an area to be a Reserved Forest, a Protected Forest or a Village Forest. It defines what is a forest offence, what are the acts prohibited inside a Reserved Forest, and penalties leviable on violation of the provisions of the Act. (Full article...) Remote sensing is the acquisition of information about an object or phenomenon without making physical contact with the object, in contrast to in situ or on-site observation. The term is applied especially to acquiring information about Earth and other planets. Remote sensing is used in numerous fields, including geophysics, geography, land surveying and most Earth science disciplines (e.g. exploration geophysics, hydrology, ecology, meteorology, oceanography, glaciology, geology). It also has military, intelligence, commercial, economic, planning, and humanitarian applications, among others. In current usage, the term remote sensing generally refers to the use of satellite- or aircraft-based sensor technologies to detect and classify objects on Earth. It includes the surface and the atmosphere and oceans, based on propagated signals (e.g. electromagnetic radiation). It may be split into "active" remote sensing (when a signal is emitted by a satellite or aircraft to the object and its reflection is detected by the sensor) and "passive" remote sensing (when the reflection of sunlight is detected by the sensor). (Full article...) Taiga (/ˈtaɪɡə/; Russian: тайга́), also known as boreal forest or snow forest, is a biome characterized by coniferous forests consisting mostly of pines, spruces, and larches. The taiga or boreal forest is the world's largest land biome. In North America, it covers most of inland Canada, Alaska, and parts of the northern contiguous United States. In Eurasia, it covers most of Sweden, Finland, much of Russia from Karelia in the west to the Pacific Ocean (including much of Siberia), much of Norway and Estonia, some of the Scottish Highlands, some lowland/coastal areas of Iceland, and areas of northern Kazakhstan, northern Mongolia, and northern Japan (on the island of Hokkaidō). The principal tree species, depending on the length of the growing season and summer temperatures, vary across the world. The taiga of North America is mostly spruce; Scandinavian and Finnish taiga consists of a mix of spruce, pines and birch; Russian taiga has spruces, pines and larches depending on the region; and the Eastern Siberian taiga is a vast larch forest. Taiga in its current form is a relatively recent phenomenon, having only existed for the last 12,000 years since the beginning of the Holocene epoch, covering land that had been mammoth steppe or under the Scandinavian Ice Sheet in Eurasia and under the Laurentide Ice Sheet in North America during the Late Pleistocene. Although at high elevations taiga grades into alpine tundra through Krummholz, it is not exclusively an alpine biome, and unlike subalpine forest, much of taiga is lowlands. The term "taiga" is not used consistently by all cultures. In the English language, "boreal forest" is used in the United States and Canada in referring to more southerly regions, while "taiga" is used to describe the more northern, barren areas approaching the tree line and the tundra. Hoffman (1958) discusses the origin of this differential use in North America and how this differentiation distorts established Russian usage. Climate change is a threat to taiga, and how the carbon dioxide absorbed or emitted should be treated by carbon accounting is controversial. (Full article...) In forestry and silviculture, a sanitation harvest or sanitation cutting is a harvest of trees for the purpose of removing insects or diseases from a stand of trees. Sanitation harvesting is used to prevent the diseases or pests from spreading to other nearby trees. It is a form of intermediate management and is used in order to improve an already existing stand of trees. (Full article...) Line plot survey is a systematic sampling technique used on land surfaces for laying out sample plots within a rectangular grid to conduct forest inventory or agricultural research. It is a specific type of systematic sampling, similar to other statistical sampling methods such as random sampling, but more straightforward to carry out in practice. This survey methodology is typically used to collect information about seedlings, shrubs, invasive species, signs of wildlife, need for fertilization, timber species count, and other similar types of data. For statistical control, all sample plots are a precise radius, typically 4 to 8 feet (120 to 240 cm), and must not include features outside each sampling circle. (Full article...) A forestry ministry (also called a forestry agency, forestry department, or forest service) is a high, often cabinet-level government ministry charged with forestry. The ministry is often headed by a minister for forestry. Specific duties may relate to forest conservation, management, reforestation, education, forest protection, wildfire management, and related areas. (Full article...) According to the Food and Agriculture Organization of the United Nations, half of the world's forests have already been altered, degraded, destroyed or converted into other land uses. Many forests suffer from illegal exploitation and poor management. FSC was established as a response to these concerns over global deforestation. Tropical deforestation as a global concern rose to prominence in the 1980s and can be somewhat attributed to a fight for action by environmentalists and northern countries over the need to protect tropical woodland. Prior to this, a number of other economic and regulatory mechanisms such as financial aid, policy frameworks, and trade conventions were established in the fight against deforestation. These include the International Tropical Timber Agreement (1983), the Convention of International Trade on Endangered Species (1975) and the Global Environment Facility (1991). Despite the increased level of concern in the run-up to the 1992 Earth Summit held in Rio de Janeiro, tensions between the North and the global South over access to finance and technology for the preservation of forests protracted negotiations. Although many Northern countries had hoped for a legally binding convention the resulting Statement of Forest Principles represents the "mean position of the lowest common denominator" and is voluntary. Disappointed with the outcome of the Earth Summit, NGOs such as the World Wide Fund for Nature (WWF) began to turn their attention to industry for a more meaningful governance-orientated resolution to the problem of deforestation. In the lead-up to the Earth Summit, social groups, NGOs, and industries were also beginning to consult on the issue of deforestation. In America, the consultation process that eventually led to the establishment of the FSC was initiated in 1990 and concluded in the confirmation of support for the development of a voluntary worldwide certification and accreditation governance system that would cover all forest types. In the UK, NGO WWF began to facilitate action through the establishment of the 1995 Group, recruiting organizations that had been spurred on by instances of direct action and boycotting over the sale of tropical wood to form an NGO-business partnership. Through stakeholder involvement, it became apparent that a standard-setting body would be required to verify the source of wood products and define sustainable forest management. After 18 months of consultation in ten different countries, the Forest Stewardship Council was established in 1993. The failure of governments to reach any notable form of consensus in the form of an internationally reaching and legally binding agreement caused both disillusionment and an opportunity for change through the involvement of civil society and business actors to form "soft law". As such the establishment of the Forest Stewardship Council as the response to this disillusionment also represents a global shift from government to governance and its creation is a primary example of the use of market and economic factors to create movement on a global environmental issue. Although the FSC transcends national boundaries, the state continues to play a part in the regulatory landscape of the domestic forest, and as such the FSC must develop appropriate domestic governance to reflect this. (Full article...) Laurel forest, also called laurisilva or laurissilva, is a type of subtropical forest found in areas with high humidity and relatively stable, mild temperatures. The forest is characterized by broadleaf tree species with evergreen, glossy and elongated leaves, known as "laurophyll" or "lauroid". Plants from the laurel family (Lauraceae) may or may not be present, depending on the location. (Full article...) Thinning is a term used in agricultural sciences to mean the removal of some plants, or parts of plants, to make room for the growth of others. Selective removal of parts of a plant such as branches, buds, or roots is typically known as pruning. In forestry, thinning is the selective removal of trees, primarily undertaken to improve the growth rate or health of the remaining trees. Overcrowded trees are under competitive stress from their neighbors. Thinning may be done to increase the resistance of the stand to environmental stress such as drought, insect infestation, extreme temperature, or wildfire. (Full article...)

List of sharks

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The largetooth cookiecutter shark (Isistius plutodus) is a rare species of squaliform shark in the family Dalatiidae, reported from depths of 60–200 m (200–660 ft) at scattered locations in the Atlantic and Pacific Oceans. As its common name suggests, it is similar in appearance to the cookiecutter shark (I. brasiliensis) but has much larger lower teeth. This species reaches a maximum known length of 42 cm (17 in). The largetooth cookiecutter shark feeds by gouging out chunks of flesh from larger animals, including bony fishes, sharks, and marine mammals, and is able to take larger bites than I. brasiliensis. Little is known of its life history; it is thought to be a weaker swimmer than I. brasiliensis, and is presumably aplacental viviparous like the rest of its family. This shark is an infrequent bycatch of commercial trawl and longline fisheries, but is not thought to be much threatened by these activities. (Full article...) The necklace carpetshark (Parascyllium variolatum), also known as the varied carpetshark, is a carpetshark of the family Parascylliidae endemic to the waters off Australia's southern coast between latitudes 37°S and 41°S. It is found near the ocean floor over sand, rock, coral reefs, and kelp and seagrass beds at depths down to 180 m (590 ft). It is almost exclusively seen at night and spends the day hidden in caves or camouflaged on the ocean floor. With a slender, elongated body and a maximum length of only 91.0 cm TL, it is harmless to humans. The tail is long, but difficult to tell apart from the rest of the shark. Its body is grey to brown in color with a broad black collar, from which it gets its name, and white spots along its body. It has small spiracles and nostrils with short barbels, likely used for sensory purposes. It is often mistaken for a species of catshark, despite being more closely related to wobbegongs and nurse sharks. It is a nocturnal predator and feeds mostly on shellfish. Reproduction is oviparous with females laying eggs with curled tendrils that anchor them to the ocean floor. The embryos feed on yolk. (Full article...) Catsharks are ground sharks of the family Scyliorhinidae. They are the largest family of sharks with around 160 species placed in 17 genera. Although they are generally known as catsharks, some species can also be called dogfish due to previous naming. However, a dogfish may generally be distinguished from a catshark as catsharks lay eggs while dogfish have live young. Like most bottom feeders, catsharks feed on benthic invertebrates and smaller fish. They are not harmful to humans. The family is paraphyletic, containing several distinct lineages that do not form a monophyletic group. (Full article...) The whitecheek shark or widemouth blackspot shark (Carcharhinus dussumieri) is a requiem shark of the family Carcharhinidae, found in the Indo-West Pacific Ocean between latitudes 34°N and 25°S. It can reach a length of 1 m. It feeds mainly on fish, cephalopods, and crustaceans. It is a viviparous species, with the female giving birth to up to four live young. The specific name honours the French explorer and trader Jean-Jacques Dussumier (1792–1883). (Full article...) Hemiscyllium galei, the Cenderawasih epaulette shark, is a species of bamboo shark in the family Hemiscylliidae. Together with H. henryi, it was only scientifically described in 2008 by Gerald R. Allen and Mark V. Erdmann. At present, H. galei is only known from depths of 2 to 4 metres (6 ft 7 in to 13 ft 1 in) at reefs in the Cenderawasih Bay in West Papua, Indonesia. The largest known specimen was 56.8 centimetres (22.4 in) long. It can be separated from its relatives (e.g., H. freycineti) by the combination of seven relatively large dark spots along the side of the body (between the abdomen and tail-base), white markings on the edge of its dark dorsal saddles and other scattered white spots on the upper side. (Full article...) Springer's sawtail catshark (Galeus springeri) is a species of catshark, belonging to the family Scyliorhinidae, found in waters 457–699 m (1,499–2,293 ft) deep off the islands of the Antilles, from Cuba to the Leewards. A small, slim-bodied species reaching a length of 48 cm (19 in), the Springer's sawtail catshark can be identified by its color pattern of horizontal dark stripes in front of the first dorsal fin, and dark dorsal saddles behind. It is additionally characterized by the presence of saw-toothed crests, made of enlarged dermal denticles along both the dorsal and the ventral edges of the caudal fin. The Springer's sawtail catshark is oviparous. (Full article...) The slendertail lanternshark or Moller's lanternshark (Etmopterus molleri) is a shark of the family Etmopteridae found in the western Indian Ocean between latitudes 34°N and 46°S at depths between 250 and 860 m. It can grow up to 46 cm in length. Reproduction is presumed to be ovoviviparous. In June 2018 the New Zealand Department of Conservation classified the slendertail lanternshark as "Data Deficient" with the qualifier "Uncertain whether Secure Overseas" under the New Zealand Threat Classification System. (Full article...) The whitetip reef shark (Triaenodon obesus) is a species of requiem shark, in the family Carcharhinidae, and the only member of its genus. A small shark that does not usually exceed 1.6 m (5.2 ft) in length, this species is easily recognizable by its slender body and short but broad head, as well as tubular skin flaps beside the nostrils, oval eyes with vertical pupils, and white-tipped dorsal and caudal fins. One of the most common sharks found on Indo-Pacific coral reefs, the whitetip reef shark occurs as far west as South Africa and as far east as Central America. It is typically found on or near the bottom in clear water, at a depth of 8–40 m (26–131 ft). During the day, whitetip reef sharks spend much of their time resting inside caves. Unlike other requiem sharks, which rely on ram ventilation and must constantly swim to breathe, this shark can pump water over its gills and lie still on the bottom. At night, whitetip reef sharks emerge to hunt bony fishes, crustaceans, and octopus in groups, their elongate bodies allowing them to force their way into crevices and holes to extract hidden prey. Individuals may stay within a particular area of the reef for months or years, frequently returning to the same shelter. This species is viviparous, in which the developing embryos are sustained by a placental connection to their mother. Whitetip reef sharks are rarely aggressive towards humans, though they may investigate swimmers closely. However, spear fishers are at risk of being bitten by one attempting to steal their catch. This species is caught for food, though ciguatera poisoning resulting from its consumption has been reported. The IUCN has assessed the whitetip reef shark as Vulnerable, noting its numbers are dwindling due to increasing levels of unregulated fishing activity across its range. The slow reproductive rate and limited habitat preferences of this species renders its populations vulnerable to overfishing. (Full article...) The nervous shark (Carcharhinus cautus) is a species of requiem shark, and part of the family Carcharhinidae, so named because of its timid behavior in regard to humans. It is common in shallow, coastal waters off northern Australia, Papua New Guinea, and the Solomon Islands. A small brownish or grayish shark typically measuring 1.0–1.3 m (3.3–4.3 ft) long, this species has a short, blunt snout, oval eyes, and a relatively large second dorsal fin. The leading margins of most fins are finely edged with black, and the lower caudal fin lobe is black-tipped. Small bony fishes are the main prey of the nervous shark, while crustaceans, molluscs, and snakes may also be eaten. It is viviparous, with the developing embryos nourished through a placental connection. The details of its life history seem to vary depending on latitude—for example, the timing of the breeding season and the length of the gestation period. Females produce litters of one to six young either annually or biennially. The harmless nervous shark is caught incidentally by coastal gillnet fisheries and perhaps also by line and trawl fisheries. The International Union for Conservation of Nature (IUCN) has been listed under Least Concern. (Full article...) The knifetooth dogfish (Scymnodon ringens), is a harmless sleeper shark of the family Somniosidae, found in the eastern Atlantic, from Scotland to Spain, Portugal, and Senegal, and the southwest Pacific from New Zealand, between latitudes 58°N and 15°N, at depths of between 200 and 1,600 m. Its length is up to 1.1 metres (3.6 ft). (Full article...) The flagtail swellshark (Cephaloscyllium signourum) is a little-known species of catshark, belonging to the family Scyliorhinidae, found at a depth of 480–700 m (1,570–2,300 ft) off northeastern Queensland, and possibly also nearby islands. This stout-bodied shark has a short, broad, and flattened head with a capacious mouth. Adults have a variegated brown coloration with 9–10 darker dorsal saddles and V-shaped blotch at the tip of the upper caudal fin lobe. Juveniles are yellow with narrow brown bars instead of saddles, and a distinctive marking between the spiracles shaped like two loops connected by a line. Like other swellsharks, this species can inflate its body when threatened. (Full article...) The flapnose houndshark (Scylliogaleus quecketti) is a houndshark of the family Triakidae, and the only member of the genus Scylliogaleus. It is found in the waters off subtropical South Africa, in the western Indian Ocean between latitudes 27 and 33°S. This shark is estimated to be 2 to 3 feet in length. They are gray with a white underside, and they have a blunt nose with large fused nasal flaps. They have small pebble like teeth and their first and second dorsal fin are the same size. They feed primarily on crustaceans such as crabs, shrimps, lobsters and some molluscs like squid. Flapnose houndsharks are viviparous and have low fecundity having just two to four pups in a litter. After gestating for nine to ten months, females give birth to pups that are about 34 cm long. Newborn flapnose houndsharks have white coloured edges on their dorsal, anal and caudal fin. There have only been 30 recorded specimens. Not seen by biologists since 1902, one was captured in 2020 on the show Extinct or Alive. It was tagged with a pop-up tracking sensor and released. (Full article...) The tailspot lanternshark (Etmopterus caudistigmus) is a shark of the family Etmopteridae found around New Caledonia, at depths of between 640 and 800 m. Its length is up to 31 cm. Reproduction is ovoviviparous. (Full article...) Negaprion is a genus of requiem sharks in the family Carcharhinidae. It contains the two extant species of lemon sharks: the lemon shark (N. brevirostris) of the Americas, and the sicklefin lemon shark (N. acutidens) of the Indo-Pacific. Both species are large, slow-moving, bulky sharks inhabiting shallow coastal waters, and can be identified by their short, blunt snouts, two dorsal fins of nearly equal size, and uniform yellowish brown or gray coloration. (Full article...) The longnose velvet dogfish (Centroselachus crepidater) is a sleeper shark of the family Somniosidae, found circumglobally in southern hemisphere subtropical seas, at depths of between 230 and 1,500 m. It reaches a length of 130 cm. It has a diet consisting of predominantly mesopelagic fishes and squids. (Full article...) The green lanternshark (Etmopterus virens) is a species of dogfish shark in the family Etmopteridae, found in the western central Atlantic Ocean. This species usually occurs on the upper continental slope below a depth of 350 m (1,150 ft). Reaching 26 cm (10 in) in length, the green lanternshark has a slender body with a long, thin tail and low, conical dermal denticles on its flanks. It is dark brown or gray with ventral black coloration, which contain light-emitting photophores that may serve a cryptic and/or social function. Green lanternsharks are thought to be gregarious and may attack their prey, squid and octopus often larger than themselves, in packs. Reproduction is aplacental viviparous, with females giving birth to litters of one to three young. This relatively common shark is an occasional, valueless bycatch of commercial fisheries; currently it does not appear to be significantly threatened by human activities. (Full article...) The roughtail catshark or marbled catshark (Galeus arae) is a common species of catshark, part of the family Scyliorhinidae. It is found at a depth of 36–702 m (118–2,303 ft) in the northwestern Atlantic Ocean, the Gulf of Mexico, and the Caribbean Sea, from North Carolina to Costa Rica. Individuals of different sexes and ages are segregated to some degree. A small species not exceeding 33 cm (13 in) in length, the roughtail catshark has a slender body with a marbled color pattern of dark saddles and spots, and a prominent crest of enlarged dermal denticles along the dorsal edge of its caudal fin. This species feeds mainly on shrimp and is oviparous. It is caught incidentally in shrimp trawls, though trawl fisheries within its range mostly do not operate at the depths it inhabits. As a result, the International Union for Conservation of Nature has listed it under Least Concern. (Full article...) The Arabian carpetshark (Chiloscyllium arabicum) is a species of carpet shark in the family Hemiscylliidae, inhabiting coral reefs and other shallow coastal habitats from the Persian Gulf to India. Reaching 78 cm (31 in) long, this shark is characterized by a slender, plain brown body, and by two dorsal fins with straight trailing margins and the second smaller but longer-based than the first. The Arabian carpetshark feeds on bony fishes and invertebrates. Reproduction is oviparous with an annual cycle; females deposit egg capsules four at a time and the young hatch after 70–80 days. This small shark is often captured as bycatch but rarely used by humans. It has been assessed as Near Threatened by the International Union for Conservation of Nature (IUCN), as there is increasing fishing pressure and habitat degradation within its range. It does well in aquariums and has been bred in captivity. (Full article...) The blacktip shark (Carcharhinus limbatus) is a species of requiem shark, and part of the family Carcharhinidae. It is common to coastal tropical and subtropical waters around the world, including brackish habitats. Genetic analyses have revealed substantial variation within this species, with populations from the western Atlantic Ocean isolated and distinct from those in the rest of its range. The blacktip shark has a stout, fusiform body with a pointed snout, long gill slits, and no ridge between the dorsal fins. Most individuals have black tips or edges on the pectoral, dorsal, pelvic, and caudal fins. It usually attains a length of 1.5 m (4.9 ft). Swift, energetic piscivores, blacktip sharks are known to make spinning leaps out of the water while attacking schools of small fish. Their demeanor has been described as "timid" compared to other large requiem sharks. Both juveniles and adults form groups of varying size. Like other members of its family, the blacktip shark is viviparous; females bear one to 10 pups every other year. Young blacktip sharks spend the first months of their lives in shallow nurseries, and grown females return to the nurseries where they were born to give birth themselves. In the absence of males, females are also capable of asexual reproduction. Normally wary of humans, blacktip sharks can become aggressive in the presence of food and have been responsible for a number of attacks on people. This species is of importance to both commercial and recreational fisheries across many parts of its range, with its meat, skin, fins, and liver oil used. It has been assessed as Vulnerable by the IUCN, on the basis of its low reproductive rate and high value to fishers. (Full article...) The speckled carpetshark, Hemiscyllium trispeculare, is a bamboo shark in the family Hemiscylliidae found around north and west Australia between latitudes 8° S and 22° S, and longitude 114° E and 152° E. Its length is up to 79 cm, and it inhabits shallow coral reefs. It is also kept in aquaria. The speckled carpetshark is closely related to the epaulette shark (Hemiscyllium Ocellatum) Reproduction is oviparous. (Full article...) The Sarawak pygmy swellshark (Cephaloscyllium sarawakensis) is a species of catshark, belonging to the family Scyliorhinidae. It is found in the benthic zone near the edge of the Pacific continental shelf, at depths of 118–165 m. (Full article...) The hooded carpetshark (Hemiscyllium strahani) is a bamboo shark in the family Hemiscylliidae found around Papua New Guinea, between latitudes 5° S and 10° S, and longitude 144° E and 153° E. Its length is up to 75 cm. Like other longtailed carpetsharks, it can use its strong pectoral fins to walk on land for a short period of time. The hooded carpetshark is heavily wanted in the aquarium trade, the result is making this shark endangered. Reproduction is oviparous. (Full article...) The shortnose demon catshark (Apristurus internatus) is a catshark of the family Scyliorhinidae found only in deep water in the East China Sea. Its length is up to 40 cm. A. internatus is known only from the holotype (a 49.1-cm-total length female) and a paratype (a 40.3-cm male), both caught in the East China Sea, probably taken as bycatch in deepwater trawl fisheries. The reproduction of this catshark is oviparous. (Full article...) The Mexican hornshark (Heterodontus mexicanus) is a bullhead shark of the family Heterodontidae. This shark is grey-brown in color, with black spots scattered on the fins and body. It has a cylindrical trunk, conical head, and small spiracles behind the eyes. The snout of the Mexican hornshark is very round and blunt. Like all members of the order Heterodontiformes, this shark has fin spines in front of both of its dorsal fins. The first dorsal fin originates before the pectoral fins, while the second dorsal fin originates behind the pelvic fins. The Mexican hornshark reaches a maximum length around 70 cm, but usually reaches between 50 and 60 cm on average. Young hornsharks hatch around 14 cm. (Full article...) Megachasma is a genus of mackerel sharks. It is usually considered to be the sole genus in the distinct family Megachasmidae, though suggestion has been made that it may belong in the family Cetorhinidae, of which the basking shark is currently the sole extant member. Megachasma is known from a single living species, Megachasma pelagios. In addition to the living M. pelagios, however, two extinct megamouth species – the Priabonian M. alisonae and the Oligocene–Miocene M. applegatei – have also recently been proposed on the basis of fossilized tooth remains. An early ancestor of the recent species Megachasma pelagios was reported from the early Miocene (Burdigalian) of Belgium. However, the Cretaceous-aged M. comanchensis has been recently reclassified as an odontaspid shark in the genus Pseudomegachasma, and is in fact unrelated to the megamouth shark despite similar teeth morphology. They are a very rare genus of shark that are mainly found in temperate and tropical waters among the Pacific, Atlantic and Indian oceans. The top sighting spots are Taiwan, Japan, and the Philippines. (Full article...)

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The whale shark (Rhincodon typus) is a slow-moving, filter-feeding carpet shark and the largest known extant fish species. The largest confirmed individual had a length of 18.8 m (61.7 ft). The whale shark holds many records for size in the animal kingdom, most notably being by far the most massive living non-cetacean animal. It is the sole member of the genus Rhincodon and the only extant member of the family Rhincodontidae, which belongs to the subclass Elasmobranchii in the class Chondrichthyes. Before 1984 it was classified as Rhiniodon into Rhinodontidae. Whale sharks inhabit the open waters of all tropical oceans. They are rarely found in water below 21 °C (70 °F). Whale sharks' lifespans are estimated to be between 80 and 130 years, based on studies of their vertebral growth bands and the growth rates of free-swimming sharks. Whale sharks have very large mouths and are filter feeders, which is a feeding mode that occurs in only two other sharks, the megamouth shark and the basking shark. They feed almost exclusively on plankton and small fishes and pose no threat to humans. The species was distinguished in April 1828 after the harpooning of a 4.6 m (15 ft) specimen in Table Bay, South Africa. Andrew Smith, a military doctor associated with British troops stationed in Cape Town, described it the following year. The name "whale shark" refers to the animal's appearance and large size; it is a fish, not a mammal, and (like all sharks) is not closely related to whales. In addition, its filter feeding habits are similar to baleen whales. (Full article...) The blind shark (Brachaelurus waddi) is one of two species of carpet sharks in the family Brachaeluridae, along with the bluegrey carpetshark (Brachaelurus colcloughi). Found along the coast of eastern Australia, this nocturnal, bottom-dwelling species is common in rocky areas and seagrass beds from the intertidal zone to a depth of 140 m (460 ft). It often roams in tidal pools where it may be trapped by the receding tide, and can survive for an extended period out of water. Maturing at under 62–66 cm (24–26 in) long, the blind shark has a stocky, grayish to brownish body with white flecks and darker bands that fade with age. Its head is wide, flattened, and blunt, with small eyes on top and a pair of long barbels underneath. It has large pectoral fins, two nearly equal-sized dorsal fins placed far back on the body, and an anal fin placed close to the caudal fin. The blind shark feeds primarily on small invertebrates and bony fishes. It is aplacental viviparous with females bearing litters of 7–8 pups in the summer. This small shark adapts readily to being kept in captivity. It is not valued by either commercial or recreational fishers, and its hardiness means that incidentally caught individuals are likely to be returned to the water alive. In the absence of substantial threats to its population, the International Union for Conservation of Nature has assessed it as of Least Concern. (Full article...) The splendid lanternshark (Etmopterus splendidus) is a shark of the family Etmopteridae found in the western Pacific at depths between 120 and 210 m. Through the classification of Etmopterus species into several clades based on the positioning of their bioluminescent photophores, the splendid lanternshark can be considered a member of the Etmopterus pusillus clade. Its length is up to 30 cm. Reproduction is ovoviviparous. (Full article...) Pristiophorus nancyae, the African dwarf sawshark or dwarf sawshark, is a sawshark of the family Pristiophoridae. The species was discovered in 2011 when a specimen was caught off the coast of Mozambique at a depth of 1,600 ft (490 m). (Full article...) The Australian angelshark (Squatina australis) is a species of angelshark, family Squatinidae, found in the subtropical waters of southern Australia from Western Australia to New South Wales between latitudes 18°S and 41°S, at depths down to 255 m (840 ft). Its length is up to 1.52 m (5 ft). Reproduction is ovoviviparous, with up to 20 pups in a litter. (Full article...) The longfin catshark (Apristurus herklotsi) is a catshark of the family Scyliorhinidae found in the western Pacific from Japan to the Philippines, and the East and South China Seas, and the Kyūshū-Palau Ridge, at depths between 530 and 865 m. Its length is up to 48 cm. (Full article...) The bigeye thresher (Alopias superciliosus) is a species of thresher shark, family Alopiidae, found in temperate and tropical oceans worldwide. Like the other thresher sharks, nearly half its total length consists of the elongated upper lobe of the tail fin. Its common name comes from its enormous eyes, which are placed in keyhole-shaped sockets that allow them to be rotated upward. This species can also be distinguished by a pair of deep grooves on the top of its head, from which its scientific name is derived. The large eyes of the bigeye thresher are adapted for hunting in low light conditions. It is one of the few sharks that conduct a diel vertical migration, staying in deep water during the day and moving into surface waters at night to feed. To protect its sensitive brain and eyes from the temperature changes accompanying these movements, the bigeye thresher has a vascular exchange system called the rete mirabile around those organs. This species feeds mainly on fish and squid, which are stunned via whip-like strikes of the long tail. Bigeye threshers are ovoviviparous, usually bearing litters of two pups. The embryos are oophagous and feed on ova produced by the mother while inside the uterus. This shark is caught by commercial fisheries across its range; the meat is not highly regarded but the skin, fins, and liver oil are valued. It has been assessed as Vulnerable by the International Union for Conservation of Nature (IUCN). (Full article...) The scoophead (Sphyrna media) is a little-known species of hammerhead shark, part of the family Sphyrnidae. It inhabits the tropical waters of the western Atlantic Ocean, from Panama to southern Brazil, and in the eastern Pacific Ocean from the Gulf of California to Ecuador, and probably northern Peru, as well. It is found in shallow, inshore habitats. One of the smaller hammerheads, the scoophead measures 150 cm long; adult males measure 90 cm long and adult females 100–133 cm. It is distinguished by its moderately broad, mallet-shaped head (22–33% as wide as the body is long). The forward margin of the head is arched, with weak medial and lateral indentations and no prenarial grooves, traits that this species shares with the scalloped bonnethead (Sphyrna corona). It is distinguished from the scalloped bonnethead by its shorter snout, broadly arched mouth, and deeply concave anal fin. The first dorsal fin is moderately falchate, and the second dorsal fin is as tall as the anal fin. The pelvic fins are not falchate, with a straight to moderately concave rear margin. Its coloration is grey-brown above, light below, with no fin markings. Off the coast of Trinidad, the scoophead coexists with two other small hammerheads, the bonnethead (Sphyrna tiburo) and the golden hammerhead (S. tudes). These species avoid competition by diet and habitat differences; the scoophead feeds on small elasmobranchs, octopus, squid, and flounders. Like other hammerheads, the scoophead is viviparous, with the pups measuring 34 cm or less at birth. It is taken with bottom longlines, gillnets, and hook and line throughout its range. It is caught commercially and sold as fresh fish or turned into fishmeal. The scoophead is also a common bycatch of the gillnet mackerel fishery off Trinidad. (Full article...) The whitespotted bullhead shark, Heterodontus ramalheira, is a bullhead shark of the family Heterodontidae found in the western and northern Indian Ocean between latitudes 22°N to 26°S, at depths between 40 and 305 m. It can grow up to a length of 83 cm. Little is known about the whitespotted bullhead shark. It is found on the outer continental shelf and is thought to feed on crabs, based on the gut contents of two specimen. As a member of the genus Heterodontus, it is thought to be oviparous, but egg case of this species have never been seen. (Full article...) The longnose pygmy shark (Heteroscymnoides marleyi) is a rare species of squaliform shark in the family Dalatiidae and the only member its genus. It is known only from a handful of specimens collected from the cold oceanic waters of the Southern Hemisphere, between the surface and a depth of 502 m (1,647 ft). Reaching 37 cm (15 in) in length, this diminutive shark is characterized by a slender, dark brown body with a very long, bulbous snout. In addition, it has two spineless dorsal fins of nearly equal size, with the origin of the first lying over the pectoral fin bases. The longnose pygmy shark does not appear substantially threatened by fisheries, and has been assessed as Least Concern by the International Union for Conservation of Nature (IUCN). (Full article...) The Atlantic weasel shark (Paragaleus pectoralis) is a weasel shark of the family Hemigaleidae, found in the eastern Atlantic Ocean. Also known as the little tiger shark, it is the only species of the genus Paragaleus to have been recorded off the western coast of Africa. It is one of four species of small sharks within the carcharhinoid genus Paragaleus, including Paragaleus leucolomatus (whitetip weasel shark), Paragaleus tengi (straight-tooth weasel shark), and Paragaleus randalli (slender weasel shark). It also one of eight species within the weasel shark family, Hemigaleidae. It is currently considered by the International Union for Conservation of Nature (IUCN) as Endangered. (Full article...) The small-spotted catshark (Scyliorhinus canicula), also known as the sandy dogfish, lesser-spotted dogfish, rough-hound or morgay (in Scotland and Cornwall), is a catshark of the family Scyliorhinidae. It is found on the continental shelves and the uppermost continental slopes off the coasts of Norway and the British Isles south to Senegal and in the Mediterranean, between latitudes 63° N and 12° N. It can grow up to a length of 1 m (3 ft 3 in), and it can weigh more than 2 kg (4.4 lb). It is found primarily over sandy, gravelly, or muddy bottoms from depths of a few metres down to 400 m (1,300 ft). S. canicula is one of the most abundant elasmobranchs in the northeast Atlantic and Mediterranean Sea. The majority of the populations are stable in most areas. (Full article...) The Papuan epaulette shark, Hemiscyllium hallstromi, is a bamboo shark in the family Hemiscylliidae found around southern Papua New Guinea, between latitudes 7° S and 10° S, and longitude 144° E and 146° E. Its length is up to 75 cm. Reproduction is oviparous. (Full article...) The silvertip shark (Carcharhinus albimarginatus) is a large species of requiem shark, in the family Carcharhinidae, with a fragmented distribution throughout the tropical Indian and Pacific Oceans. It is often encountered around offshore islands and coral reefs, and has been known to dive to a depth of 800 m (2,600 ft). The silvertip shark resembles a larger and bulkier grey reef shark (C. amblyrhynchos), but can be easily identified by the prominent white margins on its fins. It attains a maximum length of 3 m (10 ft). An aggressive, powerful apex predator, the silvertip shark feeds on a wide variety of bony fishes, as well as eagle rays, smaller sharks, and cephalopods. This species dominates other requiem sharks of equal size when competing for food, and larger individuals are often heavily scarred from conflicts with others of its species. As with other members of its family, the silvertip shark is viviparous, with females giving birth to one to 11 pups in the summer. Silvertip sharks are regarded as potentially dangerous to humans, as they often approach divers quite closely. This slow-reproducing species is taken by commercial fisheries for its meat, fins, skin, cartilage, and jaws and teeth, which has apparently led to local population declines or extirpations. (Full article...) The shortspine spurdog (Squalus mitsukurii) is a dogfish, a member of the family Squalidae, found on continental shelves off Japan in temperate waters, from the surface to 950 m. Its length is up to 75 cm. (Full article...) The dwarf catshark (Scyliorhinus torrei) is a catshark, belonging to the family Scyliorhinidae. It is found off the coast of southern Florida, the Bahamas, and Cuba and is also known as the whitespotted catshark and Cuban catshark. (Full article...) The brown catshark (Apristurus brunneus) is commonly found in the Pacific Ocean, ranging from the northern Pacific waters off the coast of British Columbia and south to the Baja California peninsula in Mexico. They may live as far south as Ecuador and Peru. Brown catsharks are deep-water sharks that live on the outer continental shelf and the upper slope. They have been known to live at depths ranging from 30 to 650 m and live on the bottom, usually in muddy or sandy areas. The brown catshark, when originally described, was called Catulus brunneus. (Full article...) Heterodontiformes is an order of sharks in the superorder Galeomorphii. It includes the bullhead sharks (genus Heterodontus), and several extinct genera. The earliest known members of the group are from the Early Jurassic (Toarcian), around 175 million years ago. Several extinct genera are known from the Jurassic, with all except Paracestracion only known from isolated teeth. The oldest known members of the modern genus appeared during the Late Jurassic. Heterodontiformes are connected to multiple species that are currently known as bullhead sharks, horn sharks, port jackson sharks, and many others. Bullhead sharks are 2-5 feet long with big broad heads and pig-like snouts. Their stiff spine on both of their dorsal fins and anal fins allow for easy movement. Gill slits located on the sides of their skeleton enables the sharks the ability to breathe. Bullhead sharks also have cone-shaped teeth in the front of their mouth and flat grinding molars in the back of their mouths to grind the hard shells of their food. For the sharks to be able to have a full range of vision prominent supraorbital ridges elevate the crest of the eye. The caudal fin separates the upper and lower lobes with a prominent notch. These fins are covered with large abrasive dermal denticles. Overall Average sharks reach from 28 to 51 inches long but a few species may reach slightly longer. Young sharks stay around 40 to 150 meters and migrate to shallow water as they age. Heterodontiformes are found in shallow water in the western and eastern Pacific Ocean and the western Indian Ocean. Their eating behaviors include creatures such as starfish, sea urchins, sea cucumbers, small fish, mollusks, and crustaceans. Bull Sharks tend to group together for short periods of time but, spend most of their time alone. (Full article...) The Bahamas sawshark, Pristiophorus schroederi, is a sawshark of the family Pristiophoridae, found in the western Central Atlantic Ocean from the Bahamas and Cuba at depths of between 400 and 1,000 m. These sharks are at least 80 cm long. The Bahamas sawshark is found on continental and insular slopes. Its reproduction is ovoviviparous. Pristiophorus schroederi is the first member of the sawsharks (family Pristiophoridae) described from the western hemisphere. Like its family members, it is most likely a descendant of the Cenozoic sawshark, Pristiophorus lanceolatus from New Zealand and Australia. It is a poorly known family and only consists of six members: P. cirratus, P. delicatus, P. japinicus, P. nancyae, P. nudipinnis, and P. schroederi. Three specimens of Pristiophoridae schroederi were discovered; 38.3, 64.5, and 80.5 centimeters in length, were collected by an incidental product of exploratory fishing operations by the U.S. Bureau of Commercial Fisheries. One was discovered in the Santaren Channel and two from the Atlantic, just north of Little Bahama Bank. (Full article...) The draughtsboard shark (Cephaloscyllium isabellum) is a species of catshark, and part of the family Scyliorhinidae, so named for its "checkerboard" colour pattern of dark blotches. It is endemic to New Zealand, where it is also known as the carpet shark (which usually refers to the entire order Orectolobiformes). This shark typically reaches 1 m (3.3 ft) in length and has a thick body with a broad, flattened head and a capacious mouth. Its two dorsal fins are placed far back on the body, with the first much larger than the second. Occurring down to a depth of 673 m (2,208 ft), the draughtsboard shark frequents rocky reefs during the day and sandy flats at night. Its diet consists of fishes and invertebrates. When threatened by a predator, it can take water or air into its body to inflate its body, which may be the cause of its unusual habit of barking like a dog. This species is oviparous, with females laying smooth, tendril-bearing egg capsules in pairs. Draughtsboard sharks are often taken as bycatch by commercial fisheries, but are probably hardy enough to survive the experience. The International Union for Conservation of Nature (IUCN) has listed this species under Least Concern. (Full article...) The graceful catshark (Proscyllium habereri) is a species of finback catshark, belonging to the family Proscylliidae. This shark is found in the western Pacific Ocean, from southeastern Japan to Vietnam and northwestern Java, at depths between 50 and 100 m. Females can reach a length of 65 cm. (Full article...) The Indonesian speckled catshark (Halaelurus maculosus) is a species of catshark in the genus Halaelurus. It is a tropical catshark found in the Pacific Ocean. It was named by W. T. White, P. R. Last, and J. D. Stevens in 2007. Male Halaelurus maculosus can reach a maximum length of 45.7 centimetres (18.0 in), while females can reach a maximum length of 52.8 centimetres (20.8 in). Catsharks in this species are occasionally caught by demersal fisheries. (Full article...) The bonnethead (Sphyrna tiburo), also called a bonnet shark or shovelhead, is a small member of the hammerhead shark genus Sphyrna, and part of the family Sphyrnidae. It is an abundant species in the littoral zone of the North Atlantic and the Gulf of Mexico, is the only shark species known to display sexual dimorphism in the morphology of the head, and is the only shark species known to be omnivorous. (Full article...) The slender smooth-hound or gollumshark (Gollum attenuatus) is a species of ground shark in the family Pseudotriakidae. It is endemic to the waters around New Zealand, where it is usually found close to the bottom over the continental slope at depths of 300–600 m (980–1,970 ft). An extremely slim, plain brownish shark reaching 1.1 m (3.6 ft) in length, the slender smooth-hound can be identified by its broad, flattened head with a long, distinctively bell-shaped snout. Its mouth is angular with short furrows at the corners, and contains a very high number of tooth rows in both jaws. Its two dorsal fins are roughly equal in size. The diet of the slender smooth-hound is diverse, but dominated by small, benthic bony fishes and decapod crustaceans. It exhibits a specialized form of aplacental viviparity with oophagy: the females produce a single capsule in each uterus that contains 30–80 ova, of which one ovum develops into an embryo that consumes the rest of the ova and stores the yolk material in its external yolk sac. The growing embryo is mainly sustained by this yolk sac during gestation, though it may be additionally supplied with histotroph ("uterine milk") produced by the mother. The typical litter size is two pups, one per uterus. The International Union for Conservation of Nature (IUCN) has assessed the slender smooth-hound as Least Concern; it is taken as fishery bycatch but not in great numbers, and furthermore large portions of its range see minimal fishing activity. (Full article...) The brown smooth-hound (Mustelus henlei) is a houndshark of the family Triakidae. It is found on the continental shelves of the subtropical eastern Pacific, from northern California to the Gulf of California, as well as Ecuador and Peru between latitudes 43° N and 18° S, from the surface to a depth of 200 m. It can grow up to a length of 1 m. The reproduction of this shark is viviparous. (Full article...)

List of dams and reservoirs

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Colbún Lake (Spanish: Lago Colbún) is a reservoir in the Maule Region in Chile, straddling the provinces of Talca (comuna of San Clemente) and Linares (comuna de Colbún). Located 48 km southeast of the city of Talca, the regional capital and 35 km northeast of the city of Linares and with an area of 5,700 hectares and a capacity of 1,490,000 m³, it is the largest artificial reservoir in Chile. The lake lies at an altitude of 440 metres above sea level. It was built between the years 1980 and 1985, in order to dam the waters of the Maule River for use in agricultural irrigation and hydroelectric power. (Full article...) Kárahnjúkar Hydropower Plant (Icelandic: Kárahnjúkavirkjun [ˈkʰauːraˌn̥juːkaˌvɪr̥cʏn]), officially called Fljótsdalur Power Station (Icelandic: Fljótsdalsstöð [ˈfljoutsˌtalsˌstœːθ]) is a hydroelectric power plant in Fljótsdalshérað municipality in eastern Iceland, designed to produce 4,600 gigawatt-hours (17,000 TJ) annually for Alcoa's Fjarðaál aluminum smelter 75 kilometres (47 mi) to the east in Reyðarfjörður. With the installed capacity of 690 megawatts (930,000 hp), the plant is the largest power plant in Iceland. The project, named after the nearby Kárahnjúkar mountains, involves damming the rivers Jökulsá á Dal and Jökulsá í Fljótsdal with five dams, creating three reservoirs. Water from the reservoirs is diverted through 73 kilometres (45 mi) of underground water tunnels and down a 420-metre (1,380 ft) vertical penstock towards a single underground power station. The smelter became fully operational in 2008 and the hydropower project was completed in 2009. The Kárahnjúkar Dam (Icelandic: Kárahnjúkastífla [ˈkʰauːraˌn̥juːkaˌstipla]) is the centrepiece of the five dams and the largest of its type in Europe, standing 193 metres (633 ft) tall with a length of 730 metres (2,400 ft) and comprising 8.5 million cubic metres (300×10^6 cu ft) of material. The project has been heavily criticised for its environmental impact and its use of foreign workers. (Full article...) The Sarsang Hydro Power Plant is a hydroelectricity plant located in Tartar District of Azerbaijan. The power plant has an installed electric capacity of 50 megawatts (67,000 hp) on Sarsang reservoir, and provides 40-60% of the electricity consumed in the Republic of Artsakh. In 1990, the station generated 81.9 million kWh. (Full article...) The Miguel Alemán Dam is on the Tonto River in the Papaloapan Region of Oaxaca state in southern Mexico, just upstream from the town of Temascal or Nuevo Soyaltepec, forming the Miguel Alemán Lake with an area of 47,800 hectares. The dam operates in conjunction with the Cerro de Oro Dam, located on the Santo Domingo River to control floods in the Papaloapan basin in Veracruz state. Together with the 22,000 hectare reservoir of the Cerro de Oro, which is joined by a channel to the Miguel Alemán Lake, the combined capacity is 13,380 million cubic metres. The lake formed by the dam is scenic, providing income from fishing and tourism. The northwestern shore and islands have been declared a nature reserve. The dam includes the Temascal hydroelectric plant. (Full article...) The Samtskhe–Javakheti Hydro Power Plant will be a large power plant in the country of Georgia. It will have two turbines with a nominal capacity of 35 MW each having a total capacity of 70 MW. (Full article...) Punt dal Gall is an arch dam located in Livigno valley, 10.5 km northeast of the Italian town of Livigno. It lies at the border between the Italian region of Lombardy and the Swiss canton of Grisons. As of June 2008, the dam's crown holds a toll that takes payment for crossing the Munt La Schera Tunnel, which connects Livigno and the Engadin valley. (Full article...) The Vajont Dam or Vaiont Dam is a disused hydro-electric dam in northern Italy. It is one of the tallest dams in the world, with a height of 262 m (860 ft). It is in the valley of the Vajont (river) under Monte Toc, in the municipality of Erto e Casso, 100 km (62 mi) north of Venice. The dam was conceived in the 1920s and eventually built between 1957 and 1960 by Società Adriatica di Elettricità, at the time the electricity supply and distribution monopoly in northeastern Italy. The engineer was Carlo Semenza (1893–1961). In 1962, the dam was nationalized and came under the control of ENEL as part of the Italian Ministry for Public Works. On 9 October 1963, during initial filling of the lake, a landslide caused a megatsunami in which 50,000,000 m3 (1.8×109 cu ft) of water overtopped the dam in a wave of 250 m (820 ft), bringing massive flooding and destruction to the Piave Valley below, destroying several villages and towns, causing an estimated 1,900 to 2,500 deaths. The dam itself remained almost intact and two-thirds of the water was retained behind it. This event occurred after ENEL and the Italian government concealed reports and dismissed evidence that Monte Toc, on the southern side of the lake, was geologically unstable. They had disregarded numerous warnings, danger signals, and negative appraisals. Underestimating the size of the landslide, ENEL's attempt to safely mitigate any landslide by lowering the level of the lake came too late, when disaster was almost imminent. (Full article...) The El Chocón Dam (Spanish: Represa El Chocón Cerros Colorados) is the fourth of the five dams on the Limay River in the northwestern Argentine Patagonia (the Comahue region), at 381 metres (1,250 ft) above mean sea level. El Chocón Cerros Colorados is on the Limay River at about 80 km (50 mi) upstream of its confluence with the Neuquén River. El Chocón Cerros Colorados is used to regulate the flow of the Limay River, for irrigation, and for the generation of hydroelectricity. Its power station is the largest hydroelectric power plant in Patagonia, with a capacity of 1,260 megawatts (1,690,000 hp). It was built by the state-owned company Hidronor (Hidroeléctrica Norpatagónica). It started operating in 1973 and achieved full capacity in 1978. In the period 1974–1995, it produced an annual average of 2,700 gigawatt-hours (9,700 TJ). In 1993 it was privatized, with an exploitation concession granted to Hidroeléctrica El Chocón S. A. While the formal name of the project is Embalse Ezequiel Ramos Mexía, in common use it ended up acquiring the name of the settlement that served as the construction's base of operations, Villa El Chocón (a small town, population 957, as of 2001). El Chocón is part of a larger engineering scheme that also includes the Cerros Colorados Complex, on the Neuquén River. The Hydroelectric Complex which holds El Chocón and Arroyito Hydroelectric Power Plants, is located in the region known as Comahue, which is formed by the Argentine provinces of Río Negro and Neuquén and the southern area of the Buenos Aires and La Pampa provinces. (Full article...) The Byrte Power Station is a hydroelectric power station located near the lake Byrtevatn in the municipality Tokke in Telemark, Norway. It exploits the water from Botnedalsvatn, a height difference of 290 metres (950 ft). (Full article...) Kyzylkungei Hydroelectric Power Plant is a hydroelectric power planton the Koksu River in Rudnichny village, Koksu District, in Almaty Province, Kazakhstan. (Full article...) La Paloma Dam re-directs here. La Paloma is an artificial lake located 27 kilometres (17 mi) southeast of the city of Ovalle, in the Coquimbo Region, Chile. Although its primary purpose is to provide water for irrigation, the reservoir is also a popular recreational spot for locals and visitors. It was first inaugurated in 1968. It has an altitude of 328 metres (1,076 ft) (Full article...) Massingir Dam is a dam on the Rio dos Elefantes (Olifants or Lepelle), Gaza Province, Mozambique. It is named after the town of Massingir, in Massingir District. The Shingwedzi River flows close to the northeastern side of the reservoir and joins the Rio dos Elefantes about 12 kilometres (7.5 mi) downstream from the dam wall. (Full article...) The Antamina Tailings Dam, also known as the Antamina Tailings Impoundment Facility, is a tailings dam located in the Huincush Ravine 55 km (34 mi) east of Huaraz in the Ancash Region of Peru. The purpose of the dam is to store tailings processed at the nearby Antamina mine. In 2003, Golder Associates, Burnaby, B.C. was awarded the 2002 Canadian Consulting Engineering Award for its innovative design of the dam. (Full article...) The Haringvlietdam, incorporating the Haringvliet sluices, are hydraulic engineering structures which closed off the estuary of the Haringvliet, Netherlands, as part of the Delta Works. The structure consists of 17 sluices, several kilometres of dam and a shipping lock, and formed the sixth project of the Delta Works. The northernmost of the Delta Works, it was supposed to be finished by 1968 as the first part of the project. Building started in 1957 and was finished in 1971. Instead of damming the estuary it was decided to build sluices in order to be able to let in salt water to prevent freezing of the rivers Meuse and Rhine and to drain these rivers in case of flood. The height of the dam crest is 18.5m above Normaal Amsterdams Peil (NAP), and 17.3m above the water level in the Haringvliet. The width between piers is 56.5 metres, and the depth of the sill of the gates was partly determined by the need for ice breakers to pass through them at low tide, being fixed at 5.5 metres below NAP. The sluice complex has 17 openings and an effective total aperture of about 6,000 square metres at half tide. The sluices have two doors each, of which the door on the sea side is the lowest. This was undertaken to mitigate the effect of waves on the doors. On the seaward side of the sluice complex, there is a 7m deep step to induce wave breaking against a concrete wall, thus reducing the strain on the gates by around 50%. The subsoil consists of clay and soft sandy layers to depths ranging from 20 to 30 metres below NAP. The sluice structures are founded on pile foundations. In 2011, Rijkswaterstaat implemented a ‘Kierbesluit’ policy, which directed that the Haringvliet sluices be opened slightly when the Haringvliet water level is lower than the sea water level, allowing limited saltwater intrusion and the migration of fish into the Haringvliet. The policy was implemented in order to improve the ecological situation in the Meuse and Rhine. The change has also resulted in a minor return of the tides in areas like Tiengemeten and the Biesbosch, both of which are important nature reserves. (Full article...) Tonstad Power Station (Tonstad kraftverk) is a hydroelectric power station located in the municipality of Sirdal in Agder county, Norway. The station is in Tonstad, at the northern end of the lake Sirdalsvatnet. It has a total installed capacity of 960 MW, with 4 units each 160 MW and one unit at 320 MW, all equipped with francis turbines. With an annual production of approximately 3800 GWh, it is the largest power station in Norway with respect to annual production (in 2006). It is near the landing point of the 1,400 MW NORD.LINK power cable to Germany. The powerstation utilises the waterfalls in the Sira and the Kvina river system, with a total height of 440 metres (1,440 ft). An application for an expansion with an additional 960 MW (pumped storage) was sent in 2008. The application is still pending. (Full article...) The Chixoy Dam (Spanish: Planta Hidroeléctrica Chixoy) is a reinforced concrete dam and power plant spanning the Chixoy River between the Departments of Baja Verapaz, El Quiché and Alta Verapaz, Guatemala. It is the largest structure of its kind in the country. It was built between 1976 and 1985 and generates approximately 15% of the country's electricity. The dam's construction was very controversial and displaced many indigenous Maya Achi peoples. Government forced relocations resulted in the Río Negro massacres which claimed up to 5,000 lives between 1980 and 1982. (Full article...) The Manantali Dam (French: Barrage de Manantali) is a multi-purpose dam on the Bafing river in the Senegal River basin, 90 kilometres (56 mi) to the south-east of Bafoulabé, in Mali's Kayes Region. (Full article...) The Nes Power Station is a hydroelectric power station located in the municipality Nes in Buskerud, Norway. The facility operates at an installed capacity of 250 MW. The average annual production is 1,330 GWh. The station is operated by E-CO Vannkraft. (Full article...)

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Senj Hydroelectric Power Plant is a large high-pressure diversion power plant harnessing the Lika and Gacka Rivers water in Croatia. Senj HPP has four turbines with a nominal capacity of 72 MW each having a total capacity of 220 MW. It is operated by Hrvatska elektroprivreda. Another unit of HE Senj is about to be built with the support of EU funds and HEP Croatian Energy Company. A construction on a billion dollar project is set to start in mid 2014 with completion dates around 2017 or 2018 at the latest. (Full article...) The Calueque Dam, is an operational multipurpose dam across the Kunene River, in Kunene Province, in southwestern Angola. The dam stores water for the 347 MW (465,000 hp) Ruacana Hydroelectric Power Station, in neighboring Namibia. Its waters are also used for the irrigation of farmland, both in Angola and Namibia. (Full article...) The Mesochora Dam is concrete-face rock-fill dam on the Acheloos River near Mesochora in Trikala, Greece. The 150 m (490 ft) tall dam is part of the Acheloos River Diversion which is intended to divert a portion of the Acheloos west to irrigate 240,000–380,000 ha (590,000–940,000 acres) in the Thessaly plains. The project includes the Mesochora, Sykia, Mouzaki and Pyli Dams along with a 17.4 km (10.8 mi) long channel. The idea for an Acheloos to Thessaly diversion project was first envisioned in the 1930s but a lack of funding precluded construction. Interest in the project was revived in 1984 and what was supposed to be a small dam at Mesochora apart from the diversion project was increased in size to support to river diversion. Over the next several years there was a series of legal battles that led to construction stalling, most recently in 2005. Opponents of the scheme cite significant changes to the environment, flooding of villages and that the scheme will divert 600,000,000 m3 (490,000 acre⋅ft) of water annually from the Acheloos. Supporters call on the benefit to the lucrative cotton crops it will help irrigate and the dam's planned 162 MW hydroelectric power plant. The Mesochora Dam was completed in January 2001 but the reservoir has yet to be filled and the power plant has subsequently not been commissioned due to legal battles. (Full article...) The Srinagarind Dam (also known as the Srinakarin Dam; Thai: เขื่อนศรีนครินทร์, RTGS: Khuean Si Nakharin, pronounced [kʰɯ̀a̯n sǐː ná(ʔ).kʰā.rīn]) is an embankment dam on the Khwae Yai River in Si Sawat District of Kanchanaburi Province, Thailand. The purposes of the dam are river regulation and hydroelectric power generation. The dam's power station has a 720 megawatts (970,000 hp) capacity of which 360 megawatts (480,000 hp) is pumped storage. The dam was named after Princess Srinagarindra. (Full article...) The Nore Power Station is a hydroelectric power station located in the municipality Nore og Uvdal in Buskerud, Norway. The oldest plant Nore I operates at an installed capacity of 206 MW, with an average annual production of 1,110 GWh. The plant Nore II has an installed capacity of 52 MW, with an average annual production of 314 GWh. (Full article...) Binga Dam is a dam in Agno River connected to a hydroelectric power plant situated at Barrio Binga, Barangay Tinongdan in the municipality of Itogon in Benguet province of the Philippines. The dam was constructed in August 1956 and opened in May 1960 under the government-owned National Power Corporation (NAPOCOR), three years after its sister facility Ambuklao Dam. It is located 31 kilometres (19 mi) southeast of Baguio and 19 kilometres (12 mi) downstream of Ambuklao Dam within the Upper Agno River Basin Resource Reserve. Improvement of the dam is ongoing for it had received heavy damage during the 1990 Luzon earthquake, and its installed capacity of 100 MW is being upgraded to 140MW. The Binga facility was constructed in 1956 for power generation and flood control. The dam and other non-power components are owned by the government through the National Power Corporation. (Full article...) Murwani Dam is a rock-fill embankment dam crossing wadi Murwani in Makkah Region, Saudi Arabia. It is located about 100 km northeast of Jeddah. The 263 mio. SR contract to build the dam was awarded to Yuksel Insaat Saudia Co Ltd., a subsidiary of the Turkish company Yüksel Holding AŞ. Work on the dam began in 2004. The dam was completed in April 2010. Main purpose of the dam is flood control, because of flash floods, which occur occasionally in the region (see also 2009 Jeddah floods). (Full article...) The Bumbuna Dam is a concrete-face rock-fill dam on the Seli River near Bumbuna in Tonkolili District, Sierra Leone, and 350 kilometres (220 mi) from the capital of Freetown, the main consumer. The country's first hydroelectric dam, it supports a 50-megawatt (67,000 hp) power station. The site for the dam at Bumbuna Falls was first identified in 1971, and construction was begun in 1975. Work was halted in May 1997, about 85% completed, due to the Sierra Leone Civil War, and did not restart until 2005. The project was completed and went online in 2009. Nearly a third of the dam's US$327 million cost ($103 million) was supplied by the African Development Bank. A 26 January 2005 report noted that 33 villages would be affected by the dam, although only one (of 16 households and 135 people) would require resettlement. The dam has a maximum height of 87 metres (285 ft), a length of 400 metres (1,300 ft) at the crest and a volume of 2,500,000 cubic metres (88,000,000 cu ft). The volume of the reservoir created is 410,000,000 cubic metres (1.4×1010 cu ft), 428,000,000 cubic metres (1.51×1010 cu ft) or 480,000,000 cubic metres (1.7×1010 cu ft). There are two Francis turbines, each rated for 25 megawatts (34,000 hp). After completion, the project has been plagued with problems, and barely produces 10 megawatts (13,000 hp) or 25 megawatts (34,000 hp) as of 2013. A second phase is planned, for a 110-megawatt (150,000 hp) power station. In June 2011, the government announced it had awarded the $750 million Phase II project to Joule Africa, a UK-based company. This will entail a second dam and plant. Construction was set to begin in 2014 and continue on until at least 2017. (Full article...) Ngondoma Dam is a dam on the Ngondoma River located 500 meters west of the Empress Mine Township in the Midlands Province of Zimbabwe. The dam is 67 kilometers northwest of the Kwekwe and 54 km southwest of Kadoma (by air). The Zhombe Communal Land lies to the east of the dam, and the Chief Chisina, Gokwe land is on its west. The dam belongs to the Zhombe East, Kwekwe District, and is one of the 1,620 dams in the Midlands. Dams in this province make up 17% of all dams in Zimbabwe and are managed by ZINWA (Zimbabwe National Water Authority). (Full article...) The Papenoo Hydroelectric Power Station is located near the commune of Papenoo on the island Tahiti in the overseas country of France, French Polynesia. It has an installed capacity of 28 MW and was constructed between 1989 and 1994. The hydroelectric power station is owned by Electricite de Tahiti SA. It is the largest hydroelectric power station in Tahiti. It uses water provided by five reservoirs high up in the Papenoo Valley, above the commune. Each reservoir is created on the Papenoo River or a tributary by an embankment dam. From highest in elevation to lowest; Vaitapaa Dam at , which lies at an elevation of 411 m (1,348 ft) above sea level, is 15 m (49 ft) tall. It withholds a reservoir of 8,000 m3 (6.5 acre⋅ft). Next, at an elevation of 400 m (1,300 ft), Tahinu Dam, at is 33 m (108 ft) high and withholds a larger reservoir of 1,500,000 m3 (1,200 acre⋅ft). It is the tallest dam in Tahiti. Moving down is Vainavenave Dam at which lies at 399 m (1,309 ft) above sea level, is 29 m (95 ft) tall, and withholds a reservoir of 150,000 m3 (120 acre⋅ft). Fourth down the valley is the Vaituoru Dam at an elevation of 200 m (660 ft) with a reservoir capacity of 100,000 m3 (81 acre⋅ft). It is located at . Finally is the Tevaiohiro Dam at 85 m (279 ft) above sea level with a reservoir volume of 150,000 m3 (120 acre⋅ft). It is located at . Water from the reservoirs is sent to three separate power stations via 25.5 km (15.8 mi) of penstock. The power station highest in elevation, Papenoo 1 contains four 4 MW Pelton-turbine-generators and is located at . Next downstream is Papenoo 2 at which contains one 4 MW Pelton turbine-generators. Lastly, Papenoo 3 contains two 4 MW Pelton turbine-generators and is located at . (Full article...) Sangtuda 1 Hydroelectric Power Plant (Russian: Сангтудинская ГЭС-1; Tajik: Нерӯгоҳи барқи обии Сангтӯда-1) is a hydroelectric power plant, located on the Vakhsh River in Tajikistan. Construction commenced during the Soviet period in the 1980s, but halted in the beginning of the 1990s due to lack of financing when the station was about 20% complete. An agreement with Russia allowed to restart the construction, with four units entering service in 2008–2009. The plant was officially commissioned on 31 July 2009. Once working at full capacity, the plant will provide around 12% of Tajikistan's electricity output. (Full article...) The Bayano Dam is a dam on the Bayano River in Darién Province, Panama. The dam was built in 1976; its construction flooded approximately 350 square kilometers of rainforest, displacing thousands of indigenous residents. The flooded area is now Bayano Lake. The dam is the second-largest power source in Panama. (Full article...) The Sogamoso Dam is a concrete-face rock-fill dam on the Sogamoso River in northern Colombia. It is located 30 kilometres (19 mi) west of Bucaramanga in Santander Department and 285 kilometres (177 mi) north of Bogotá. The primary purpose of the dam is hydroelectric power generation and its power plant has an installed capacity of 820 megawatts (1,100,000 hp) which increased Colombia's generating capacity by 10 percent. Construction on the dam began in February 2009 and its first 273 MW Francis turbine-generator was commissioned on 1 December 2014. The other two generators were operational by 20 December 2014. The US$1.74 billion dam and power plant is owned by ISAGEN. INGETEC designed the dam in the 1990s and Impreglio was awarded the contract for construction. The dam is 190 metres (620 ft) tall and withholds a 4,800 million cubic metres (3,900,000 acre⋅ft) reservoir. The power plant houses four 273 megawatts (366,000 hp) Francis turbine-generators. Its spillway is located on its left bank and controlled by four radial gates. It has a maximum discharge of 17,100 cubic metres per second (600,000 cu ft/s). The dam has been the subject of protests among locals as it relocated 160 families and negatively impact the livelihood of miners within the reservoir zone and fishers downstream. Relocation of the residents, construction of a new bridges and roads will cost US$202 million. A 100-metre (330 ft) wide protected area was established around the reservoir. (Full article...) The Kastraki Dam is an earth-fill embankment dam on the Achelous River near the village of Kastraki in Aitoloakarnania, Greece. It was completed in 1969 for the purposes of hydroelectric power generator, flood control and irrigation. The dam's power station houses four 80 MW Francis turbine-generators for an installed capacity of 320 MW. In 2010 the dam's overflow chute spillway was upgraded with 20 fuse plugs which increased the maximum height of the Lake Kastraki reservoir by 1.93 m (6.3 ft) and its storage capacity by 44,000,000 m3 (36,000 acre⋅ft). Terna plans the 680 MW / 5,872 MWh Amphilochia pumped-storage hydroelectricity facility, using Kastraki as the lower reservoir, and a 5 million cubic metre and a 2 million cubic metre as upper reservoirs. (Full article...) Mantasoa Dam is a buttress dam on the Varahina-North River, a tributary of the Ikopa River, near Mantasoa in the Analamanga Region of Madagascar. The dam was constructed by French contractors between 1937 and 1938. It creates Lake Mantasoa which has a surface area of 20 km2 (7.7 sq mi). The dam itself is made of 8,000 m3 (10,000 cu yd) of concrete and has a reinforced buttress design. Water released from the dam supplies a regulated flow to hydroelectric power station at the Antelomita Dams downstream. A saddle dam on the north side of the Mantosoa reservoir regulates water flow into the Mandraka River for the Mandraka Dam downstream. (Full article...) El Atazar Dam is an arch dam built near Madrid, Spain on the Lozoya River, very close to where the Lozoya joins the Jarama. The curved design of the dam is optimum for the narrow gorge in which it was built to retain water in the reservoir. Arch dams are thin and require less material to construct than other dam types. When the dam was built, the decision was made to use the dam to store and regulate water only and not to provide energy. Construction started on the dam in 1968 and finished in 1972. (Full article...) Escaldes Hydroelectric Power Station is located in Engolasters of the Encamp parish in Andorra. Its namesake, Les Escaldes, is located just to the south in Escaldes-Engordany parish. It uses water from Lake Engolasters, located 1,616 metres (5,302 ft) above sea level in order to generate hydroelectricity. A 1,250 metres (4,100 ft) long penstock deliver water from the 178 m (584 ft) long Engolasters Dam to the power station which contains two 14 MW and one 17 MW Pelton turbine-generators. The difference in elevation between the lake and power station is about 490 metres (1,610 ft). In 1929 the General Council of Andorra granted Forces Andorranes Societat Anonima (FASA), a Spanish and French-owned company, the ability to develop the country for hydroelectric power. In return, FASA would construct roads various highways connecting to Andorra in return for exporting the energy. Construction of the power station and Engolasters Dam began in 1930 and the power station with two 14 MW generators was commissioned in August 1934. Beginning in 2007, a third Pelton turbine-generator was added to the station. At 17 MW, it was commissioned in 2008. (Full article...) The Kapshagay Hydroelectric Power Plant (Kazakh: Қапшағай су электр станциясы, Qapshaǵaı sý elektr stantsııasy; Russian: Капшагайская ГЭС, earlier Капчагайская ГЭС) is a hydroelectricity power plant on the Ili River in Almaty Province of Kazakhstan. Constructed between 1965 and 1970, it has four individual turbines with a nominal output of around 91 MW which will deliver up to 364 MW of power and generates 972 million kilowatt-hours of electricity per year. It is operated by Almaty Power Stations, and fed by Kapchagay Reservoir (resulting from the construction of Kapchagay Dam). (Full article...) Trebinje I Hydroelectric Power Station or Trebinje-1 Hydroelectric Power Station is hydroelectric power plant (HPP) on the Trebišnjica River near Gornje Grančarevo in the municipality of Trebinje in Bosnia and Herzegovina. Trebinje-1 HPP is accumulation with dam toe powerhouse type of facility with a large Grančarevo arch dam. At the height of 123 m (404 ft), Grančarevo dam is the tallest dam in the country. Its reservoir, Bileća Lake, is the largest by volume in Bosnia and Herzegovina as well. The dam provides for flood control and hydroelectric power generation at Trebinje-1 HPP. The dam was completed in 1967 and its 180 MW power station, A smaller 8 MW power station, Treblinje-2, was completed downstream in 1979. Reversible (pumped-storage) Čapljina Hydroelectric Power Station, using Trebišnjica waters through compensation basin Lake Vrutak, was commissioned in 1968. The river Trebišnjca also powers Dubrovnik Hydroelectric Power Station in Croatia, which receiving Trebišnjica waters from Trebinjsko Lake across the state border via derivation tunnel. (Full article...) Kedung Ombo Reservoir is one of the major reservoirs in Indonesia. It is located on the border of three regencies in Central Java Province, namely Grobogan Regency, Sragen Regency, and Boyolali Regency, in District Geyer, Grobogan District. The main dam of Kedung Ombo Reservoir is located on the border of Rambat Village and Juworo Village, Geyer Sub-District, Grobogan District. This reservoir uses Serang River as its main source of water, along with the Uter/Sungai Kombo/Banjaran River. Other water sources are supplied from several large and small rivers that supply water to Kedung Ombo Reservoir, including the Braholo River, Central River, Nglanji River, Tapen River and Sambas River. (Full article...) Milluni (Aymara millu light brown, reddish, fair-haired, dark chestnut, -ni suffix to indicate ownership, "the one that has got a brown colour") is a lake on the western side of the Cordillera Real of Bolivia located in the La Paz Department, Pedro Domingo Murillo Province, El Alto Municipality, north of El Alto. The lake is situated at a height of 4,565 metres (14,977 ft) south of the mountain Wayna Potosí, at the foot of Chacaltaya. It is about 1.83 km long and 1 km at its widest point. The surface is 2.37 km2 (0.92 sq mi). At the south side there is a dam. Milluni Lake is also called Milluni Grande (Spanish for big) in order to distinguish it from a smaller, half moon shaped lake next to it in the north, Milluni Chico (Spanish for small), which is situated at a height of 4,585 m. (Full article...) The Murum Dam (Malay: Empangan Murum) is a gravity dam on the Murum River in Sarawak, Malaysia. Construction began in 2008, the dam's reservoir began to fill in July 2013 and the first generator was commissioned in December 2014. The fourth and final turbine became operational on 8 June 2015. Concerns have been raised about the displacement of the Dayak people and the removal of rainforest due to the construction of the dam. The dam site is located on the Murum River, which is in the uppermost part of the Rajang River basin, 200 km (124 mi) from Bintulu. The upstream of Rajang river includes four steps, which are Pelagus, Bakun, Murum, and Belaga. The Murum Hydroelectric Project is the second Step-Hydroelectric Project of the four steps, and is 70 km (43 mi) from the constructing Bakun Hydroelectric Project downstream. (Full article...)

List of mountain ranges

{{ Transclude list item excerpts as random slideshow | List of mountain ranges | section=Mountain ranges on Earth }} Select from Earth section, avoiding Moon

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The John Long Mountains, el. 7,923 feet (2,415 m), is a small mountain range northwest of Philipsburg, Montana in Granite County, Montana. The Beaverhead-Deerlodge National Forest and Lolo National Forest manage these mountains. A sizable roadless area of about 65,000 acres existed, as of 1990, in the John Long Mountains, centered on Silver King Mountain in the southern part of the range. It's unknown whether and to what extent this area's size has been reduced by logging. Lightly used trails traverse whitebark pine forests on the higher ridges, and forests of lodgepole pine, Douglas-fir, and heavy downfall on the eastern slopes. The western slopes have groves of douglas-fir amidst extensive grassy parks. Silver King Mountain is 7,581'. The Babcock Mountain Bighorn Sheep Viewing Area, on the Rock Creek Road along the western edge of the John Longs, is an 8,000-acre area on the Lolo National Forest where bighorn sheep are commonly seen. Parking and hiking trails are provided. There is some dispute as to whether the Quigg Peak roadless area, described in the Sapphire Mountains article, is really part of the John Long Mountains. If the Quigg Peak area is truly part of the John Long Mountains, then the highest point in the range would be Butte Cabin Ridge, el. 8,468'. (Full article...) Bieszczady Mountains [bʲɛˈʂt͡ʂadɨ] (Polish: Bieszczady; Slovak: Beščady; Ukrainian: Бещади, romanized: Beshchady; Hungarian: Besszádok) is a mountain range that runs from the extreme south-east of Poland and north-east of Slovakia through to western Ukraine. It forms the western part of the Eastern Beskids (Polish: Beskidy Wschodnie; Ukrainian: Східні Бескиди, romanized: Skhidni Beskyky), and is more generally part of the Outer Eastern Carpathians. The mountain range is situated between the Łupków Pass (640 m) and the Vyshkovskyi Pass (933 m). The highest peak of Bieszczady is Mt Pikui (1405 m) in Ukraine. The highest peak of the Polish part is Tarnica (1346 m). Upper parties of Bieszczady are covered with montane meadows called polonyna (Ukrainian: полонина; Polish: połonina; Slovak: polonina). (Full article...) The Cordillera Vicuña Mackenna is the highest section of the Chilean Coast Range located in northern Chile, west of Pampa del Tamarugal. Its peak reaches over 3000 meters. It runs north-south for approximately 170 km parallel to the Andes. The driest parts of Atacama Desert are located east of the range due to the rain shadow produced by it. The range is named after historian Benjamín Vicuña Mackenna. (Full article...) The Daly Range or Daly Mountains (Danish: Daly Bjerge) is a mountain range in Peary Land, Northern Greenland. Administratively this range is part of the Northeast Greenland National Park. It forms the eastern end of the northernmost mountain range on Earth. The area of the range is barren and uninhabited. (Full article...) The New Guinea Highlands, also known as the Central Range or Central Cordillera, is a long chain of mountain ranges on the island of New Guinea, including the island's tallest peak, Puncak Jaya, Indonesia, 16,024 ft (4,884 m), the highest mountain in Oceania. The range is home to many intermountain river valleys, many of which support thriving agricultural communities. The highlands run generally east-west the length of the island, which is divided politically between Indonesia in the west and Papua New Guinea in the east. (Full article...) The Sierra Fría is a mountain range in central Mexico. It forms the northwestern border of Aguascalientes state and extends into adjacent Zacatecas, west of the city of Aguascalientes. (Full article...) The Grinnell Range is a mountain range on northwestern Devon Island, Nunavut, Canada. It is one of the northernmost mountain ranges in the world forming part of the Arctic Cordillera mountain system. (Full article...) The Itcha Range, also known as the Itchas, is a small isolated mountain range in the West-Central Interior of British Columbia, Canada. It is located 40 km (25 mi) northeast of the community of Anahim Lake. With a maximum elevation of 2,375 m (7,792 ft), it is the lowest of three mountain ranges on the Chilcotin Plateau extending east from the Coast Mountains. Two mountains are named in the Itcha Range; Mount Downton and Itcha Mountain. A large provincial park surrounds the Itcha Range and other features in its vicinity. More than 15 animal species are known to exist in the Itcha Range area, as well as a grassland community that is limited only to this location of British Columbia. The Itcha Range is within territory which has been occupied by aboriginal peoples for millennia. This area has a relatively dry environment compared to the Coast Mountains in the west. In contrast to most mountain ranges in British Columbia, the Itcha Range represents an inactive shield volcano. This highly dissected volcanic edifice consists of a variety of rock types, including basanite, hawaiite, trachyte, rhyolite, phonolite and alkali olivine basalt. They were deposited by different types of volcanic eruptions characterized by passive lava flows and explosivity. Two stages of eruptive activity have been identified at the volcano along with three sub-phases that are limited only to the first stage of development. The main body of the Itcha Range is between 3.8 and 3.0 million years old and thus over two million years ago it passed the most active shield stage of life. A period of dormancy lasting for almost a million years followed, which was interrupted by the post-shield stage of volcanism 2.2 to 0.8 million years ago. More recent volcanic activity in and around the Itcha Range might have occurred in the last 340,000 years to produce cinder cones. The Itcha Range is part of an east–west trending volcanic zone called the Anahim Volcanic Belt. This consists of large shield volcanoes, small cinder cones, lava domes and lava flows that become progressively younger from west to east. Several explanations have been made regarding the creation of this feature, each citing a different geologic process. If volcanic activity were to resume at the Itcha Range, Canada's Interagency Volcanic Event Notification Plan (IVENP) is prepared to notify people threatened by eruptions. (Full article...) The Kreuzeck Group is a mountain range of the Central Eastern Alps. It may be considered either a separate range or part of the larger High Tauern chain. Administratively, the range belongs to the Austrian states of Carinthia and, in the westernmost part, Tyrol (i.e. East Tyrol). (Full article...) Phnom Kulen (or Kulen Mountain; Khmer: ភ្នំគូលែន, Phnum Kulên [pʰnom kuːlɛːn]; lit. 'Lychee Mountain') is a mountain range and a part of Phnom Kulen National Park in Siem Reap Province, Cambodia. (Full article...) The Halifax Range is a small mountain range on Vancouver Island, British Columbia, Canada, adjacent to Johnstone Strait, between Amor de Cosmos Creek and Pye Creek. It consists of hills and has an area of 51 km2 and is a subrange of the Vancouver Island Ranges which in turn form part of the Insular Mountains. (Full article...) The Dentelles de Montmirail are a small chain of mountains in Provence in France, in the département of Vaucluse, located just to the south of the village of Vaison-la-Romaine. They are foothills of the highest peak in Provence, Mont Ventoux, which is situated just to the east. The dramatically jagged shape of their peaks was formed by horizontal strata of Jurassic limestone being folded and forced into a nearly upright position and subsequently eroded into sharp-edged ridges and spikes. The highest peak of the Dentelles is St-Amand, at 734 m (2,400 ft). The range, which is about 8 km wide, offers over 600 trails for walking, rock climbing, and mountain biking. The foot of the Dentelles is surrounded by vineyards of the Rhône Valley. (Full article...) The Old Man Range, also called Kopuwai, is a mountain range in Central Otago, in the South Island of New Zealand. It lies to the west of the valley of the Clutha River, close to the town of Alexandra and the artificial Lake Roxburgh. The range stretches north-south for a distance of some 40 kilometres (25 mi). Part of the range forms the border between the Otago and Southland Regions. The range's Māori name, Kopuwai, means "Water Swallower", and was the name of a mythical giant who lived in the area. The range rises to a narrow ridge at a height of just over 1,500 metres (4,900 ft). The highest points are the 1,682 metres (5,518 ft) Obelisk (also known as The Old Man, and from which the range gets its name) at (), and Hyde Rock (1,673 metres (5,489 ft)). The eastern flanks of the range are steep, falling away to the Clutha Valley. In contrast, the western flanks fall gently to a high plateau before rising to a lower ridge known as the Old Woman Range. The plateau which has areas of both bare rock and marsh, is the source of numerous creeks, most of them part of the catchment of the young Waikaia and Earnscleugh Rivers. The geology of the range is dominated by the schists of the Caples and Torlesse Terranes. The rock is a source of gold, and the area was worked during the Otago Gold Rush of the 1860s. Several remnants of the mining era can still be seen in the range. Much of the range is conservation land controlled by the New Zealand Department of Conservation (DOC), and divided between the Kopuwai and Bain Block Conservation Areas. Two more, much smaller, ranges of this name exist in New Zealand — a low range of hills in inland Canterbury, between Lakes Pukaki and Alexandrina, and a higher hill range in the Tasman District, close to Farewell Spit. (Full article...) The Ortler Alps (Italian: Alpi dell'Ortles ; German: Ortler-Alpen; Romansh: Alps da l'Ortler) are a mountain range of the mountain group in the Central Eastern Alps, in Italy and Switzerland. (Full article...) The Sierra de Famatina is a mountain range and massif in the Andes of the Argentine province of La Rioja. The range rises between the north-south valleys of Bermejo and Antinaco-Los Colorados. The highest point, designated Cerro General Belgrano (once known as Nevado de Famatina), rises 20,505 ft (6,250 m) and is featured in the coat of arms of La Rioja Province. (Full article...) The Columbia Mountains are a group of mountain ranges along the Upper Columbia River in British Columbia, Montana, Idaho and Washington. The mountain range covers 135,952 km² (52,491 sq mi). The range is bounded by the Rocky Mountain Trench on the east, and the Kootenai River on the south; their western boundary is the edge of the Interior Plateau. Seventy-five percent of the range is located in Canada and the remaining twenty-five percent in the United States; American geographic classifications place the Columbia Mountains as part of the Rocky Mountains complex, but this designation does not apply in Canada (despite a British Columbia government tourism campaign to rebrand their southern portion as the "Kootenay Rockies"). Mount Sir Sandford is the highest mountain in the range, reaching 3,519 metres (11,545 ft). (Full article...) The Gronau Nunataks (Danish: Gronau Nunatakker) is a mountain range in King Christian IX Land, eastern Greenland. Administratively this range is part of the Sermersooq Municipality. (Full article...) The Lepontine Alps (German: Lepontinische Alpen, French: Alpes lépontines, Italian: Alpi Lepontine) are a mountain range in the north-western part of the Alps. They are located in Switzerland (Valais, Ticino, Uri and Graubünden) and Italy (Piedmont and Lombardy). The Simplon rail tunnel (from Brig to Domodossola), the Gotthard rail (from Erstfeld to Bodio) and Gotthard road tunnels (from Andermatt to Airolo) and the San Bernardino road tunnel are important transport arteries. The eastern portion of the Lepontine Alps, from the St Gotthard Pass to the Splügen Pass, is named the Adula Alps, while the western part is historically referred to as the Ticino Alps. (Full article...) The Granite Mountains are a short subrange of the Rocky Mountains in central Wyoming of the United States. The range runs approximately 100 mi (160 km) E-W along the south side of the Shoshone Basin, and north of the Sweetwater River, in eastern Fremont County and western Natrona County. The highest point is McIntosh Peak at 8,058 feet (2,456 m). Independence Rock is at the east end of the range, and Split Rock was a prominent landmark on the Oregon Trail. The region is rich in uranium and other mineral deposits. (Full article...) The Yudoma-Maya Highlands (Russian: Юдомо-Майское нагорье, tr. Yudomo-Maiskoye Nagorye; Yakut: Юдома-Маайа хаптал хайалаах сиринэн) are a mountainous area in the Sakha Republic and Khabarovsk Krai, Far Eastern Federal District, Russia. The settlement of Allakh-Yun is located in the area of the highlands on the right bank of the Allakh-Yun River. (Full article...) The Medicine Bow Mountains are a mountain range in the Rocky Mountains that extend 100 miles (160 km) from northern Colorado into southern Wyoming. The northern extent of this range is the sub-range the Snowy Range. From the northern end of Colorado's Never Summer Mountains, the Medicine Bow mountains extend north from Cameron Pass along the border between Larimer and Jackson counties in Colorado and northward into south central Wyoming. In Wyoming, the range sits west of Laramie, in Albany and Carbon counties to the route of the Union Pacific Railroad and U.S. Interstate 80. The mountains often serve as a symbol for the city of Laramie. The range is home to Snowy Range Ski Area. The highest peak in the range is Clark Peak (12,960 feet (3,950 m)), located in the Rawah Wilderness along the southern end of the range in Northern Colorado. Much of the range is located within the Medicine Bow National Forest in Wyoming. The highest peak on the Wyoming side is Medicine Bow Peak (12,013 feet (3,662 m)). The range is drained along the western flank by the Michigan and Canadian rivers, tributaries of the North Platte in North Park. On its eastern flank it is drained by the Laramie River, another tributary of the North Platte. (Full article...) The Ankogel Group (German: Ankogelgruppe) is a sub-group of the Central Eastern Alps. Together with the Goldberg Group, the Glockner Group, the Schober Group, the Kreuzeck Group, the Granatspitze Group, the Venediger Group, the Villgraten Mountains and the Rieserferner Group it forms the mountain range of the Hohe Tauern (High Tauern). The Ankogel Group is located in the Austrian federal states of Salzburg and Carinthia. Its highest peak is the Hochalmspitze, 3,360 m (AA) (11,020 ft). (Full article...) The Karakoram (/ˌkɑːrəˈkɔːrəm, ˌkær-/) is a mountain range in the Kashmir region spanning the border of Pakistan, China, and India, with the northwestern extremity of the range extending to Afghanistan and Tajikistan. Most of the Karakoram mountain range falls under the jurisdiction of Gilgit-Baltistan, which is controlled by Pakistan. Its highest (and the world's second-highest) peak, K2, is located in Gilgit-Baltistan, Pakistan. It begins in the Wakhan Corridor (Afghanistan) in the west, encompasses the majority of Gilgit-Baltistan, Pakistan and extends into Ladakh (controlled by India) and Aksai Chin (controlled by China). The Karakoram is the second-highest mountain range on Earth and part of a complex of ranges that includes the Pamir Mountains, Hindu Kush, and Himalayas. The range contains 18 summits higher than 7,500 m (24,600 ft) in elevation, with four above 8,000 m (26,000 ft): K2 (8,611 m (28,251 ft) AMSL) (the second-highest peak on Earth), Gasherbrum I, Broad Peak, and Gasherbrum II. The range is about 500 km (311 mi) in length and is the most glaciated place on Earth outside the polar regions. The Siachen Glacier (76 km (47 mi) long) and Biafo Glacier (63 km (39 mi) long) are the second- and third-longest glaciers outside the polar regions. The Karakoram is bounded on the east by the Aksai Chin plateau, on the northeast by the edge of the Tibetan Plateau and on the north by the river valleys of the Yarkand and Karakash rivers beyond which lie the Kunlun Mountains. At the northwest corner are the Pamir Mountains. The southern boundary of the Karakoram is formed, west to east, by the Gilgit, Indus and Shyok rivers, which separate the range from the northwestern end of the Himalaya range proper. These rivers flow northwest before making an abrupt turn southwestward towards the plains of Pakistan. Roughly in the middle of the Karakoram range is the Karakoram Pass, which was part of a historic trade route between Ladakh and Yarkand that is now inactive. The Tashkurghan National Nature Reserve and the Pamir Wetlands National Nature Reserve in the Karalorun and Pamir mountains have been nominated for inclusion in UNESCO in 2010 by the National Commission of the People's Republic of China for UNESCO and have been tentatively added to the list. (Full article...) The Amargosa Range is a mountain range in Inyo County, California and Nye County, Nevada. The 110-mile (180 km) range runs along most of the eastern side of California's Death Valley, separating it from Nevada's Amargosa Desert. The U-shaped Amargosa River flows clockwise around the perimeter of the range, ending 282 feet (86 m) below sea level in the Badwater Basin. The mountain range is named after the Amargosa River, so-named for the Spanish word for bitter because of the bitter taste of the water. In order from north to south, the Grapevine Mountains (including the range's highest point, 8,738 feet (2,663 m) Grapevine Peak), the Funeral Mountains, and the Black Mountains form distinct sections. Many of Death Valley National Park's most well-known features, such as Zabriskie Point and Artists Drive are located in or are part of the Amargosa Range. The Amargosa mountains are also home to Corkscrew Peak, so named because it resembles a corkscrew. (Full article...)

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The Fairweather Range is the unofficial name for a mountain range located in the U.S. state of Alaska and the Canadian province of British Columbia. It is the southernmost range of the Saint Elias Mountains. The northernmost section of the range is situated in Tatshenshini-Alsek Provincial Park while the southernmost section resides in Glacier Bay National Park, in the Hoonah-Angoon Census Area. In between it goes through the southeastern corner of Yakutat Borough. Peaks of this range include Mount Fairweather (the highest point in British Columbia) and Mount Quincy Adams 4,150 m (13,615 ft). The range is home to the Fairweather Fault, an active geologic transform fault of the larger Queen Charlotte Fault along the boundary between the Pacific and North American plates. (Full article...) The Ogo Mountains (Ogo Highlands), also known as the Galgodon Highlands, (Somali: Buuraha Oogo, Arabic: جبل أوغو) are a mountain range in Somaliland. They cross the Sanaag and Togdheer regions. With a mean peak height of 2,450 m (8,040 ft), the ecology of this landform is semi-desert. According to the CULTURAL ORIENTATION SOMALI published by the Defense Language Institute in 2020, the Golis Mountains is another name for the Galgala Hills, part of the Karkaar mountain range, and the Ogo Highlands are south of the Karkaar mountain range. However, the areas to which these place names refer vary from literature to literature. (Full article...) The Graah Mountains (Danish: Graah Fjelde or Graah Bjerge) are a mountain range in southeastern Greenland. Administratively this range is part of the Kujalleq municipality. This mountain group was named after Wilhelm August Graah, who described them for the first time during his 1829 expedition to the little known eastern coast of Greenland in search of the lost Eastern Norse Settlement. The area of the range is currently uninhabited. (Full article...) The Darran Mountains are a prominent range within New Zealand's Fiordland National Park, the country's biggest national park. They contain the park's highest peak, Mount Tūtoko (2,723 metres (8,934 ft)). (Full article...) The Saint Elias Mountains (French: Chaîne Saint-Élie) are a subgroup of the Pacific Coast Ranges, located in southeastern Alaska in the United States, Southwestern Yukon and the very far northwestern part of British Columbia in Canada. The range spans Wrangell-St. Elias National Park and Preserve in the United States and Kluane National Park and Reserve in Canada and includes all of Glacier Bay National Park in Alaska. In Alaska, the range includes parts of the city/borough of Yakutat and the Hoonah-Angoon and Valdez-Cordova census areas. This mountain range is named after Mount Saint Elias, which in turn was named in 1741 by the Danish explorer Vitus Bering. (Full article...) Vrachanski Balkan Nature Park (Bulgarian: Природен парк „Врачански Балкан“) is a nature park in Bulgaria with an area of 30129.9 ha established on 21 December 1989. (Full article...) The Dinaric Alps (/dɪˈnærɪk/), also Dinarides, are a mountain range in Southern and Southcentral Europe, separating the continental Balkan Peninsula from the Adriatic Sea. They stretch from Italy in the northwest through Slovenia, Croatia, Bosnia and Herzegovina, Serbia, Montenegro, and Kosovo to Albania in the southeast. The Dinaric Alps extend for approximately 645 kilometres (401 mi) along the western Balkan Peninsula from the Julian Alps of the northeast Italy, downwards to the Šar and Korab massif, where their direction changes. The Accursed Mountains are the highest section of the entire Dinaric Alps; this section stretches from Albania to Kosovo and eastern Montenegro. Maja Jezercë, standing at 2,694 metres (8,839 ft) above the Adriatic, is the highest peak and is located in Albania. The Dinaric Alps are one of the most rugged and extensive mountainous areas of Europe, alongside the Caucasus Mountains, Alps, Pyrenees, Carpathian Mountains and Scandinavian Mountains. They are formed largely of Mesozoic and Cenozoic sedimentary rocks of dolomite, limestone, sandstone and conglomerates formed by seas and lakes that once covered the area. During the Alpine earth movements that occurred 50 to 100 million years ago, immense lateral pressures folded and overthrust the rocks in a great arc around the old rigid block of the northeast. The main tectonic phase of the orogenesis in the area of the Dinaric Karst took place in Cenozoic Era (Paleogene) as a result of the Adriatic Microplate (Adria) collision with Europe, and the process is still active. The Dinaric Alps were thrown up in more or less parallel ranges, stretching like necklaces from the Julian Alps as far as northern Albania and Kosovo, where the mountainous terrain subsides to make way for the waters of the Drin River and the plains of Kosovo. (Full article...) The Tian Shan (Chinese: 天山), also known as the Tengri Tagh or Tengir-Too, meaning the "Mountains of God/Heaven", is a large system of mountain ranges in Central Asia. The highest peak is Jengish Chokusu at 7,439 metres (24,406 ft) high. Its lowest point is the Turpan Depression, which is 154 m (505 ft) below sea level. One of the earliest historical references to these mountains may be related to the Xiongnu word Qilian (traditional Chinese: 祁連; simplified Chinese: 祁连; pinyin: Qílián), which, according to Tang commentator Yan Shigu, is the Xiongnu word for "sky" or "heaven". Sima Qian, in the Records of the Grand Historian, mentioned Qilian in relation to the homeland of the Yuezhi, and the term is believed to refer to the Tian Shan rather than the range 1,500 kilometres (930 mi) further east now known as the Qilian Mountains. The name of the Tannu-Ola mountains in Tuva has the same meaning. The Chinese name Tian Shan is most likely a direct translation of the traditional Kyrgyz name for the mountains, Teñir Too. The Tian Shan is sacred in Tengrism. Its second-highest peak is known as Khan Tengri, which may be translated as "Lord of the Spirits". At the 2013 Conference on World Heritage, the eastern portion of Tian Shan in western China's Xinjiang Region was listed as a World Heritage Site. The western portion in Kazakhstan, Kyrgyzstan, and Uzbekistan was then listed in 2016. (Full article...) The Bitterroot Range is a mountain range and a subrange of the Rocky Mountains that runs along the border of Montana and Idaho in the northwestern United States. The range spans an area of 24,223 square miles (62,740 km2) and is named after the bitterroot (Lewisia rediviva), a small pink flower that is the state flower of Montana. (Full article...) The Little Snowy Mountains are a small mountain range in central Montana about 25 miles (40 km) southeast of Lewistown. The range lies mostly in Fergus County, but the southern part of the range extends into Golden Valley and Musselshell counties. The range is a lower continuation of the Big Snowy Mountains which lie immediately to the west. The small Pike Creek Hills are 12 miles (19 km) to the east. The mountain pass between the Big and Little Snowies is at 6,018 feet (1,834 m) where Red Hill Road crosses the range. The pass elevation is considerably lower than the peaks of the Big Snowy range, but only about 200 feet (61 m) lower than the highest of the Little Snowy Range which are just northeast of the pass. Bold Butte, a named highpoint near the center of the range, has an elevation of 5,624 feet (1,714 m). The South Fork Flatwillow Creek runs from the north side of the pass near Red Hill and east along the north side of the range. Willow Creek and various tributaries drain most of the range to the south and flows into the Musselshell River on to the southeast. (Full article...) The Challenger Mountains are a mountain range on Ellesmere Island in Nunavut, Canada. The range is the most northern range in the world and of the Arctic Cordillera. The highest mountain in the range is Commonwealth Mountain 2,225 m (7,300 ft). The United States Range is immediately to the east of the Challenger Mountains. The range lies within Quttinirpaaq National Park, the second most northerly park in the world after Northeast Greenland National Park in Greenland. Low elevation lakes located along Taconite Inlet are part of the Challenger Mountains and local relief exceeds 1,250 m (4,101 ft). (Full article...) Shenandoah Mountain is a mountain ridge approximately 73 miles (117 km) long in Virginia and West Virginia. The steep, narrow, sandstone-capped ridge extends from northern Bath County, Virginia to southern Hardy County, West Virginia. Along the way, its crest defines the borders between Highland and Augusta counties, Virginia, and between Pendleton County, West Virginia, and Rockingham County, Virginia. Its high point is 4397’/1340 m Reddish Knob along the Virginia/West Virginia border. Located in the Ridge and Valley physiographic province of the Appalachian Mountains, Shenandoah Mountain forms part of the western margin of the Shenandoah Valley, and is part of the easternmost Allegheny Mountains. It lies almost entirely within the George Washington National Forest. U.S. Route 33 crosses the mountain between Franklin, West Virginia, and Harrisonburg, Virginia. Other Shenandoah Mountain high peaks are Flagpole Knob (Virginia; 4383’/1336 m), and Bald Knob (Virginia; 3680’/1122 m). (Full article...) Sierra de San Pedro Mártir (Kiliwa: ʔxaal haq, English: mountains of Saint Peter the Martyr) is a mountain range located within southern Ensenada Municipality and southern Baja California state, of northwestern Mexico. It is a major mountain range in the long Peninsular Ranges System, that extends from Southern California down the Baja California Peninsula into Baja California Sur state. (Full article...) The Dunstan Mountains are a mountain range in Central Otago, in the South Island of New Zealand. The mountains lie on the eastern shore of the man-made Lake Dunstan and overlook the towns of Cromwell to the west, Clyde to the south and Omakau to the east. The highest named peak on the mountain range, a rocky knoll simply called Dunstan, is 1,667 m (5,469 feet). Together with the Cairnmuir Mountains to the south, the Dunstan Mountains form the Cromwell Gorge which was dammed to form New Zealand's third-largest hydroelectric dam, the Clyde Dam. The Dunstan Mountains should not be confused with the Dunstan Range, a small mountain range which lies approximately 20 km (12 mi) north of the Dunstan Mountains near the Lindis Pass. (Full article...) The Heimefront Range is a range of mountains in three groups trending northeast–southwest for 65 nautical miles (120 km), situated 50 nautical miles (93 km) west-southwest of the Kirwan Escarpment in Queen Maud Land, Antarctica. The range was observed and photographed by the Norwegian–British–Swedish Antarctic Expedition in the course of air reconnaissance from Maudheim Station in January 1952. The name "Heimefrontfjella" (homefront range) was applied by the placename authority in the Norwegian government. This range may include the crudely mapped mountains identified as "Kottas Berge" on the map of the Third German Antarctic Expedition of 1938–39. Wide glaciers divide the Heimefront Range in four ice free areas. These are, from north east to south west: Milorgfjella (Kottas Berge, Milorg Mountains), XU-fjella (XU Mountains), Sivorgfjella and Tottan Hills. (Full article...) Dientes de Navarino (Teeth of Navarino in English) are a mountain range in Navarino Island, Chile, located just south of Puerto Williams, along the Beagle Channel coast. They are named for the jagged pinnacles which resemble teeth. There is a rough hiking circuit around the range. Depending on weather conditions the trek takes 5 to 7 days. The trail was first set out in the 1990s by the Australian climber and author Clem Lindenmayer. The route passes peaks known as Cerro Clem and Montes Lindenmayer, that in 2001 the Chilean Ministry of Natural Resources named in his honour. Lindenmayer was the author of the Lonely Planet guide Trekking in the Patagonian Andes. In the 1940s the Argentine government released beavers on to Tierra del Fuego in the hope of starting a prosperous fur trade. With no natural predators, the beavers quickly spread. The forests around the Dientes de Navarino mountains have no natural defences to beavers and so, have suffered severely. Many of the lake shores surrounding the mountains have been stripped of trees. (Full article...) The Flinders Ranges are the largest mountain ranges in South Australia, which starts about 200 km (125 mi) north of Adelaide. The ranges stretch for over 430 km (265 mi) from Port Pirie to Lake Callabonna. The Adnyamathanha people are the Aboriginal group who have inhabited the range for tens of thousands of years. Its most well-known landmark is Wilpena Pound / Ikara, a formation that creates a natural amphitheatre covering 80 km2 (31 sq mi) and containing the range's highest peak, St Mary Peak (1,171 m (3,842 ft)). The ranges include several national parks, the largest being the Ikara-Flinders Ranges National Park, as well as other protected areas. It is an area of great geological and palaeontological significance, and includes the oldest fossil evidence of animal life was discovered. The Ediacaran Period and Ediacaran biota take their name from the Ediacara Hills within the ranges. In August 2022, a nomination for the Flinders Ranges to be named a World Heritage Site was lodged. (Full article...) The Victoria and Albert Mountains () are a mountain range running on the east coast of Ellesmere Island, Nunavut, Canada. The range is one of the most northern ranges in the world and of the Arctic Cordillera. The highest mountain in the range is Agassiz Ice Cap Summit at 2,201 m (7,221 ft). The range has an area of 37,650 km2 (14,540 sq mi). (Full article...) Berkovitsa (Bulgarian: Берковица [bɛrˈkɔvit͡sɐ]) is a town and ski resort in northwestern Bulgaria. It is the administrative centre of the homonymous Berkovitsa Municipality, Montana Province and is close to the town of Varshets. , it has a population of 13,917 inhabitants. (Full article...) The Wichita Mountains are located in the southwestern portion of the U.S. state of Oklahoma. It is the principal relief system in the Southern Oklahoma Aulacogen, being the result of a failed continental rift. The mountains are a northwest-southeast trending series of rocky promontories, many capped by 500 million-year old granite. These were exposed and rounded by weathering during the Pennsylvanian and Permian Periods. The eastern end of the mountains offers 1,000 feet (305 m) of topographic relief in a region otherwise dominated by gently rolling grasslands. The mountains are home to numerous working ranches and quarry operations, the state reformatory, recreational homes and campsites, and scenic parklands. Fort Sill, home of the U.S. Army Field Artillery School, occupies a large portion of the southeastern end of the mountains. (Full article...) The Hindu Kush is an 800-kilometre-long (500 mi) mountain range on the Iranian Plateau in Central and South Asia to the west of the Himalayas. It stretches from central and eastern Afghanistan into northwestern Pakistan and far southeastern Tajikistan. The range forms the western section of the Hindu Kush Himalayan Region (HKH); to the north, near its northeastern end, the Hindu Kush buttresses the Pamir Mountains near the point where the borders of China, Pakistan and Afghanistan meet, after which it runs southwest through Pakistan and into Afghanistan near their border. The eastern end of the Hindu Kush in the north merges with the Karakoram Range. Towards its southern end, it connects with the White Mountains near the Kabul River. It divides the valley of the Amu Darya (the ancient Oxus) to the north from the Indus River valley to the south. The range has numerous high snow-capped peaks, with the highest point being Tirich Mir or Terichmir at 7,708 metres (25,289 ft) in the Chitral District of Khyber Pakhtunkhwa, Pakistan. The Hindu Kush range region was a historically significant center of Buddhism, with sites such as the Bamiyan Buddhas. The range and communities settled in it hosted ancient monasteries, important trade networks and travelers between Central Asia and South Asia. While the vast majority of the region has been majority-Muslim for several centuries now, certain portions of the Hindu Kush only became Islamized relatively recently, such as Kafiristan, which retained ancient polytheistic beliefs until the 19th century when it was converted to Islam by the Durrani Empire and renamed Nuristan ("land of light"). The Hindu Kush range has also been the passageway for invasions of the Indian subcontinent, and continues to be important to contemporary warfare in Afghanistan. (Full article...) Herangi Range is a range of hills south of Marokopa and north of Awakino, in the Waikato region of New Zealand, reaching to the Tasman Sea at Tapirimoko, Tirua, Taungaururoa, Te Mauku and Ngarupupu Points. Just to the south of Ngarupupu, the Waikawau River enters the sea. Other rivers draining the range are Mangaotaki River, Awakino River and Manganui River. Herangi is part of the Whareorino conservation area. Herangi is in the Maniapoto rohe. Pā and other archaeological sites are found close together along the coast, but very few in the range itself. The Kiritehere valley was settled in the 1900s, but much of the rest of the range is in Whareorino Conservation Area, of particular importance for its native frogs. A Reims Cessna F152 II crashed into a tree on a ridge between Whareorino (649 m (2,129 ft)) and Mangatoa Saddle on 21 July 2009. The pilot, who died, was inexperienced and had not complied with requirements to calculate a route allowing for the poor weather. (Full article...) The Brooks Range (Gwich'in: Gwazhał) is a mountain range in far northern North America stretching some 700 miles (1,100 km) from west to east across northern Alaska into Canada's Yukon Territory. Reaching a peak elevation of 8,976 feet (2,736 m) on Mount Isto, the range is believed to be approximately 126 million years old. In the United States, these mountains are considered a subrange of the Rocky Mountains, whereas in Canada they are considered separate, as the northern border of the Rocky Mountains is considered to be the Liard River far to the south in the province of British Columbia. While the range is mostly uninhabited, the Dalton Highway and Trans-Alaska Pipeline System run through the Atigun Pass (1,415 m, 4,643 ft) on their way to the oil fields at Prudhoe Bay on Alaska's North Slope. The Alaska Native villages of Anaktuvuk and Arctic Village, as well as the very small communities of Coldfoot, Wiseman, Bettles, and Chandalar, are the range's only settlements. In the far west, near the Wulik River in the De Long Mountains is the Red Dog mine, the largest zinc mine in the world. The range was named by the United States Board on Geographic Names in 1925 after Alfred Hulse Brooks, chief USGS geologist for Alaska from 1903 to 1924. Various historical records also referred to the range as the Arctic Mountains, Hooper Mountains, Meade Mountains and Meade River Mountains. The Canadian portion of the range is officially called the British Mountains. Ivvavik National Park is located in Canada's British Mountains. (Full article...)

List of dams and reservoirs (Africa)

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Lagdo Reservoir is a reservoir located in the Northern Province of Cameroon, on the Benue River, in the Niger basin. The lake covers an area of 586 km2. (Full article...) The Garafiri Dam is an embankment dam on the Konkouré River which forms the boundary between the Kindia and Mamou Regions of Guinea. The dam was constructed by Salini Impregilo between 1995 and 1999 for the purpose of hydroelectric power generation and water supply. The power station had a breakdown in 2002 but was repaired shortly afterwards. The power station has an installed capacity of 75 megawatts (101,000 hp). (Full article...) The Diama Dam, sometimes referred to as the Maka–Diama Dam (French: Barrage de Maka-Diama) is a gravity dam on the Senegal River, spanning the border of Senegal and Mauritania. It is located next to the town of Diama, Senegal and about 22 km (14 mi) north of Saint-Louis, Senegal. The purpose of the dam is to prevent saltwater intrusion upstream, supply water for the irrigation of about 45,000 ha (110,000 acres) of crops and create a road crossing for the road between St. Louis and Nouakchott in Mauritania. Additionally, a ship lock built within the dam provides for navigation upstream. Plans for the dam were first drawn in 1970 when the riparian states within the Senegal River Basin Development Authority agreed to develop the Senegal River. The Diama Dam was to be constructed in conjunction with the Manantali Dam which was to be located further upstream in Mali. Construction on the Diama Dam began on 15 September 1981 and was completed on 12 August 1986. The Manantali Dam was completed in 1988. The Diama project was funded by a US$149.5 million loan from the African Development Bank. The main section of the dam with ship lock and spillway is 170 m (560 ft) long while a 440 m (1,440 ft) long embankment dam section extends north to the edge of the river. A dike further extends the dam to the north. The dam is 18 m (59 ft) tall and its spillway has a maximum discharge of 6,500 m3/s (230,000 cu ft/s). The small town of Diama is known as a border crossing to and from Mauritania, as the dam is the only land bridge between the two countries. (Full article...) The Wadi Kaam Dam is an embankment dam located on Wadi Kaam, 22 km (14 mi) west of Zliten in Misrata District, Libya. Completed in 1979, the primary purpose of the dam is water supply for irrigation. The dam was designed and built by Energoprojekt Hidroinženjering, a subsidiary of the Yugoslavian engineering company Energoprojekt, under the supervision of Chief Engineer Stojan J. Čanović. (Full article...) The Hassan I Dam is an embankment dam located 19 kilometres (12 mi) northeast of Demnate on the Lakhdar River in Azilal Province, Morocco. Completed in 1986, the dam provides water for the irrigation of over 40,000 hectares (99,000 acres) of farmland. The dam's hydroelectric power plant also generates 132 gigawatt-hours (480 TJ) on average annually. At 145 metres (476 ft) in height, it is the tallest dam in Morocco and the tallest earth-fill dam in Africa. The dam is named after Hassan I of Morocco. (Full article...) The Laúca Hydroelectric Power Station is a 2,070 MW (2,775,916 hp) hydroelectric power plant in Angola. It is the largest power station in the country. (Full article...) The Song Loulou Power Station is a hydroelectric power plant of the Sanaga River in Cameroon. It has a power generating capacity of 384 megawatts (515,000 hp), enough to power over 257,100 homes. The Song Loulou power station is built upstream of another power station; the Edea power station. Unlike the Edea power station that mainly powers the aluminum smelter located next to it, the Song Loulou power station mainly powers homes and other industrial plants in the south of the country. (Full article...) Nyumba ya Mungu Dam is a Tanzanian, hydroelectric dam located in and operated in Mwanga District , Kilimanjaro Region. It was built in the late 1960s and is Kilimanjaro region's largest artificial water body. Nyumba ya Mungu Reservoir. The reservoir is shared with Moshi District of Kilimanjaro Region and Simanjiro District of Manyara Region. Nyumba ya Mungu means 'House of God'. Its installed capacity is 8 megawatts (11,000 hp). (Full article...) The Kossou Dam is an embankment dam that impounds the Bandama River about 32 kilometres (20 mi) northwest of Yamoussoukro in Côte d'Ivoire. It has a power generating capacity of 174 megawatts (233,000 hp), enough to power over 118,000 homes. The dam impounds the largest lake in Côte d'Ivoire, Lake Kossou. (Full article...) Mphanda Nkuwa Dam is a proposed hydroelectric dam on the Zambezi River in Mozambique. The dam would be located about 60 kilometres (37 mi) downstream of the existing Cahora Bassa Dam near the city of Tete. Its power station would have a capacity of 1,500 megawatts. The dam would be 103 metres (338 ft) high and flood approximately 97 square kilometres (24,000 acres) of the Zambezi valley. The estimated cost of the project is US$4.2 billion. Once the dam is completed, it is expected that most of the generated power will be sold to South Africa, because of the lack of transmission infrastructure in Mozambique. The proposed dam is highly controversial because it would force the relocation of 1,400 families, and affect the livelihoods of a further 200,000 people downriver. Because the dam would be operated on a peaking basis, large daily fluctuations in river flow would ruin existing irrigation systems and affect aquaculture in the river's extensive delta. The United Nations has described this project as the "least environmentally acceptable major dam project in Africa." In 2015, the Mozambique government announced it would start construction of the dam. The construction was contracted to Camargo Corrêa of Brazil, INSITEC of Mozambique, and Electricidade de Moçambique. In 2020, Mozambique President Filipe Nyusi wished construction of the dam started before 2024. In 2022, the International Finance Corporation (IFC), a subsidiary of the World Bank Group, signed agreements with the Mozambican government, indicating willingness to participate in the development of this renewable energy project. (Full article...) The Karuma Hydroelectric Power Station is a 600 MW hydroelectric power project under construction in Uganda. When completed, it will be the largest power-generating installation in the country. (Full article...) The Bui Dam is a 400-megawatt (540,000 hp) hydroelectric project in Ghana. It is built on the Black Volta river at the Bui Gorge, at the southern end of Bui National Park. The project was a collaboration between the government of Ghana and Sino Hydro, a Chinese construction company. Construction on the main dam began in December 2009. Its first generator was commissioned on 3 May 2013, and the dam was inaugurated in December of the same year. Bui is the second largest hydroelectric generating plant in the country after the Akosombo Dam. The reservoir flooded about 20% of the Bui National Park and impacted the habitats for the rare black hippopotamus as well as a large number of wildlife species. It required the resettlement of 1,216 people, and affected many more. (Full article...) The Mohamed V Dam is an arch-gravity dam located 35 kilometres (22 mi) south of Zaio on the Moulouya River in Oujda-Angad Province, Morocco. The primary purpose of the dam is supplying water for the irrigation of 70,000 hectares (170,000 acres) downstream. Water is also used for hydroelectric power production and water supply to the city of Nador. The dam is named after Mohammed V of Morocco. The dam's reservoir and wetlands were designated as a Ramsar site in 2005. (Full article...) The Sidi Salem Dam is the largest embankment dam in Tunisia located 6 kilometres (3.7 mi) northwest of Testour on the Medjerda River in Béja Governorate, Tunisia. Constructed between 1977 and 1981, the dams supplies water for irrigation and supports a 12 megawatts (16,000 hp) power station. (Full article...)

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The Kossou Dam is an embankment dam that impounds the Bandama River about 32 kilometres (20 mi) northwest of Yamoussoukro in Côte d'Ivoire. It has a power generating capacity of 174 megawatts (233,000 hp), enough to power over 118,000 homes. The dam impounds the largest lake in Côte d'Ivoire, Lake Kossou. (Full article...) The Fincha Power Station is a hydroelectric power plant fed through Chomen Lake and discharging into the Fincha River in Ethiopia near the town of Fincha in western Oromia. It has a power generating capacity of 100 megawatts (130,000 hp), enough wattage to power over 66,900 homes. (Full article...) Ruzizi III Hydroelectric Power Station is a proposed hydropower plant with planned capacity installation of 206 MW when completed. (Full article...) The Gwenoro Dam is located inside Gwenoro Farm, an estate formerly owned by Ian Douglas Smith (1919-2007), a former Prime Minister of Rhodesia. The farm was seized in stages by the Government of Zimbabwe from Ian Smith and his family between 2002 and December 2012. The Gwenoro Dam supplies water to nearby Gweru and Shurugwi in Zimbabwe. The dam is constructed on the Runde River (formerly Lundi River; a medium density suburb in Gweru is named after the river (Lundi Park)). The name Gwenoro is derived from a wild animal found in the area known in the local language of Shona as Nhoro (gweNORO), which means a 'place inhabited by Nhoro'. The area is very beautiful and picturesque. The dam is full from January to June. Fish co-operatives are sprouting around the banks of this river. ZIMASCO used to run a mine club but has since stopped. What remains are only buildings. (Full article...) The Rusumo Hydroelectric Power Station (Kinyarwanda: Urugomero rw'amashanyarazi rwa Rusumo, French: Centrale hydroélectrique de Rusumo), also known as the Rusumo Power Station, is a hydropower plant under construction, with initial planned capacity installation of 80 megawatts (110,000 hp) when completed. The project will involve the construction of a dam, with run of river design. A more expensive 90 megawatts (120,000 hp) reservoir design was considered before being abandoned in favor of an 80 MW project with a smaller environmental impact and an estimated cost of US$300 million compared to US$400 million for the bigger project. The World Bank announced on 6 August 2013 that it had approved loans totaling US$340 million towards the US$468.60 million needed for the project. In November 2013, the African Development Bank approved a loan of US$113 million towards completion of the project. (Full article...) The Laúca Hydroelectric Power Station is a 2,070 MW (2,775,916 hp) hydroelectric power plant in Angola. It is the largest power station in the country. (Full article...) The Aswan Dam, or more specifically since the 1980s, the Aswan High Dam, is one of the world's largest embankment dams, which was built across the Nile in Aswan, Egypt, between 1960 and 1970. When it was completed, it was the tallest earthen dam in the world, eclipsing the United States' Chatuge Dam. Its significance largely upstaged the previous Aswan Low Dam initially completed in 1902 downstream. Based on the success of the Low Dam, then at its maximum utilization, construction of the High Dam became a key objective of the new regime the Free Officers movement of 1952; with its ability to better control flooding, provide increased water storage for irrigation and generate hydroelectricity, the dam was seen as pivotal to Egypt's planned industrialization. Like the earlier implementation, the High Dam has had a significant effect on the economy and culture of Egypt. Before the High Dam was built, even with the old dam in place, the annual flooding of the Nile during late summer had continued to pass largely unimpeded down the valley from its East African drainage basin. These floods brought high water with natural nutrients and minerals that annually enriched the fertile soil along its floodplain and delta; this predictability had made the Nile valley ideal for farming since ancient times. However, this natural flooding varied, since high-water years could destroy the whole crop, while low-water years could create widespread drought and consequently famine. Both these events had continued to occur periodically. As Egypt's population grew and technology increased, both a desire and the ability developed to completely control the flooding, and thus both protect and support farmland and its economically important cotton crop. With the greatly increased reservoir storage provided by the High Aswan Dam, the floods could be controlled and the water could be stored for later release over multiple years. The Aswan Dam was designed by Nikolai Aleksandrovich Malyshev of the Moscow-based Hydroproject Institute. Designed for both irrigation and power generation, the dam incorporates a number of relatively new features, including a very deep grout curtain below its base. Although the reservoir will eventually silt in, even the most conservative estimates indicate the dam will give at least 200 years of service. (Full article...) The Mohamed V Dam is an arch-gravity dam located 35 kilometres (22 mi) south of Zaio on the Moulouya River in Oujda-Angad Province, Morocco. The primary purpose of the dam is supplying water for the irrigation of 70,000 hectares (170,000 acres) downstream. Water is also used for hydroelectric power production and water supply to the city of Nador. The dam is named after Mohammed V of Morocco. The dam's reservoir and wetlands were designated as a Ramsar site in 2005. (Full article...) Hombolo Dam is a dam in Tanzania. It is at Hombolo-Bwawani village, in Dodoma-rural District. The dam was constructed by the colonial government in 1957 for irrigation, domestic water supply, and water for livestock. (Full article...) The Sidi Salem Dam is the largest embankment dam in Tunisia located 6 kilometres (3.7 mi) northwest of Testour on the Medjerda River in Béja Governorate, Tunisia. Constructed between 1977 and 1981, the dams supplies water for irrigation and supports a 12 megawatts (16,000 hp) power station. (Full article...) The Nkhula B Hydroelectric Power Station, also Nkula B Hydroelectric Power Station is a hydroelectric power plant on the Shire River in Malawi. It has a power generating capacity of 100 megawatts (130,000 hp). (Full article...) Al Wahda Dam, formerly known as M'Jaara Dam, is an embankment dam on the Ouergha River near M´Jaara in Ouezzane Province, Morocco. It was constructed for flood control, irrigation, water supply and hydroelectric power production. It is the second largest dam in Africa and the largest in Morocco. It was described by Land Ocean Interactions in the Coastal Zone (LOICZ) as "the second most important dam in Africa after the High Aswan dam." (Full article...) The Song Loulou Power Station is a hydroelectric power plant of the Sanaga River in Cameroon. It has a power generating capacity of 384 megawatts (515,000 hp), enough to power over 257,100 homes. The Song Loulou power station is built upstream of another power station; the Edea power station. Unlike the Edea power station that mainly powers the aluminum smelter located next to it, the Song Loulou power station mainly powers homes and other industrial plants in the south of the country. (Full article...) The Koka Reservoir (Oromo: Haroo Qooqaa) is a reservoir in south-central Ethiopia. It was created by the construction of the Koka Dam across the Awash River. The reservoir has an area of 180 square kilometers. (Full article...)

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Peter Lee Jung-sum (23 October 1939 – 3 September 2008), was a former assistant director of Hong Kong Observatory. He was the elder brother of Bruce Lee. (Full article...) The Bruce Lee Library is composed of books written by or about Bruce Lee (1940-1973), famous Hongkongese and American martial artist, philosopher, author, instructor of martial arts, actor, filmmaker and screenwriter. (Full article...) Kung-Fu Master, known as Spartan X in Japan, is a side-scrolling beat 'em up developed by Irem as an arcade video game in 1984, and distributed by Data East in North America. Designed by Takashi Nishiyama, the game was based on Hong Kong martial arts films. It is a loose adaptation of the Jackie Chan, Sammo Hung, and Yuen Biao film Wheels on Meals (1984), called Spartan X in Japan, with the protagonist Thomas named after Jackie Chan's character in the film. The game is also heavily inspired by the Bruce Lee film Game of Death (1972), which was the basis for the game's concept. Nishiyama, who had previously designed the side-scrolling shooter Moon Patrol (1982), combined fighting elements with a shoot 'em up gameplay rhythm. Irem and Data East exported the game to the West without the Spartan X license. The player controls Thomas, the titular Kung-Fu Master, as he fights his way through the five levels of the Devil's Temple to rescue his girlfriend Sylvia from the crime boss Mr. X. As he ascends the tower, he has to fight many enemies along the way and five end-of-level boss battles, a concept inspired by Game of Death. Thomas and each boss have a health meter, and the game temporarily becomes a one-on-one fighting game during boss battles. The game was a major commercial success, topping the Japanese arcade charts and becoming America's second highest-grossing arcade game of 1985, while receiving critical acclaim for its fast-paced, side-scrolling gameplay and detailed, colorful graphics. A port for the Nintendo Entertainment System (known as the Famicom in Japan) was developed by Nintendo under the direction of Shigeru Miyamoto, released as Spartan X in Japan and Kung-Fu in the West, selling 3.5 million copies worldwide. It was also one of the top five best-selling Commodore 64 games of 1986. It spawned the sequel Spartan X 2 (1991) and the spiritual successors Trojan (1986) and Vigilante (1988). (Full article...) Robert Lee Jun-fai (born 16 December 1948) is a Hong Kong musician. He is the younger brother of the late martial artist Bruce Lee. (Full article...) Lee in 1998 Linda Emery Lee Cadwell (née Emery; born March 21, 1945) is a retired American teacher and writer, the widow of martial artist and actor Bruce Lee (1940–1973), and the mother of actor Brandon Lee (1965–1993) and actress Shannon Lee (born 1969). She is the author of the Bruce Lee biography Bruce Lee: The Man Only I Knew, upon which the film Dragon: The Bruce Lee Story (1993) is based, as well as the founder, a former trustee of, and an unpaid advisor of the Bruce Lee Foundation. (Full article...) Dragon Lee (born 1958) is an actor and practitioner of taekwondo and hapkido. He made a name for himself as a martial arts film star in the 1970s and 80s. His birth name is Moon Kyung-seok, but he is also called Keo Ryong (literally "giant dragon") in South Korea. Lee studied taekwondo with friend and actor Kim Tai-chung, who served as Bruce Lee's double in the final scenes of "Game of Death." It was at this stage of his life that Lee began studying also the Korean martial art of hapkido under Hwang In-shik, who appeared with Bruce Lee in Way of the Dragon. When Dragon Lee was at a theater, a man told him that he resembled Bruce Lee, a big compliment because Bruce Lee was popular at the time. The man knew film directors in Hong Kong and helped Dragon Lee advance his career. (Full article...) The Deadly Hands of Kung Fu was published in the mid-to-late 1970s by Magazine Management, a corporate sibling of Marvel Comics, amid the martial arts movie fad of the time. Launched in 1974 as part of Magazine Management's line of black-and-white comics magazines, it ran 33 issues through 1977. Recurring characters included: The Sons of the Tiger – Three men and one woman linked by mystical amulets The White Tiger – Heir to the amulets of the Sons of the Tiger Shang Chi, Master of Kung Fu (from Marvel Comics), incorporating characters and concepts licensed from the Sax Rohmer estate Iron Fist the Living Weapon (from Marvel Comics) The Daughters of the Dragon – Colleen Wing and Misty Knight (characters derived from Marvel Comics' Iron Fist series) Each issue had comics stories featuring these characters, both single-issue stories and multi-issue story arcs. Most issues also included a review of a recent martial arts film. Other issues had interviews with martial arts instructors, while others had interviews with movie or television celebrities related to martial arts. Early issues had a martial arts instructional section which described some elementary fighting techniques. These were provided by comics illustrator/martial artist Frank McLaughlin. The magazine was in black-and-white except for the cover. The cost of the magazine was 75 cents for issues #1–14. Issue #15 was a Super Annual (all reprints) issue and cost $1.25. Issues #16–33 were $1.00, as well as the 1974 Kung Fu Special (summer 1974); cover-titled Special Album Edition: The Deadly Hands of Kung Fu. Issue #28 (Sept. 1976) was an all-Bruce Lee special, including a 35-page comic book format biography written by Martin Sands, and drawn by Joe Staton and Tony DeZuniga. (Full article...) Wong Jack-man (born 1941 – December 26, 2018) was a Chinese martial artist and teacher. He was best known for his controversial duel with Bruce Lee in 1964. (Full article...) Ho circa 1940 Grace Ho (Chinese: 何愛瑜; 1907 – 24 June 1996) was the mother of Bruce Lee. She and her husband Lee Hoi-chuen were the parents of Bruce as well as Peter Lee, Robert Lee, Phoebe Lee, and Agnes Lee. (Full article...) In 2016, Magnetic Press published four issues of Bruce Lee: The Dragon Rises, co-written by Lee's daughter Shannon Lee and Jeff Kline, and illustrated by Brandon McKinney. The fictional story takes places in 2012 with Bruce Lee escaping from a science lab. In 2018, Magnetic Press/Darby Pop Publishing released the one-shot Bruce Lee: The Walk Of The Dragon, also written by Shannon Lee. (Full article...) A statue of Bruce Lee was unveiled on 26 November 2005, in the city of Mostar, Bosnia and Herzegovina, by sculptor Ivan Fijolić. Located in Zrinjevac City Park, the life-sized statue stands 1.68 m (5 ft 6 in) tall, shorter than Bruce Lee's actual height of 1.72 m (5 ft 8 in), and was a symbol of solidarity in the ethnically-divided city until it was stolen in a heist on March 4, 2024, and was subsequently found albeit cut in pieces. (Full article...) Spirit of the Dragon (龍在江湖 李小龍傳奇) is a Hong Kong TV series based on famous martial artist Bruce Lee. The 30 episode series was released on ATV in 1992. (Full article...) Chen Zhen (陳真; 陈真; Chén Zhēn; Can4 Zan1) is a fictional character created by Hong Kong writer Ni Kuang. First portrayed by Bruce Lee in the 1972 film Fist of Fury, the character has been the subject of numerous film and television series, including remakes and adaptations of Fist of Fury. Many notable actors, including Jet Li and Donnie Yen, have portrayed Chen Zhen on screen after Bruce Lee. Although Chen Zhen's story varies in the different remakes and adaptations, most have an ending similar to the original Fist of Fury. Chen Zhen is believed to be based on Liu Zhensheng (劉振聲), an apprentice of Huo Yuanjia, a martial artist who lived during the late Qing dynasty of China. (Full article...) The Real Bruce Lee, also known as Last Fist of Fury, is a 1977 martial arts documentary. The version of the film that is commonly distributed in the West (USA) on public domain-type DVD and video labels runs 93 minutes in length. The British VHS-version released in 1979 runs 118 minutes. (Full article...) The Los Angeles Times Syndicate launched The Legend of Bruce Lee comic strip, featuring fictional stories about the deceased actor and martial artist, in May 1982. The syndicate had originally approached veteran comic strip creators Milton Caniff and Noel Sickles about doing a Bruce Lee strip in 1978. The project never got off the ground, and five years later the syndicate tried again. Intended for "downscale, . . . very young audiences", The Legend of Bruce Lee was intended to "help boost newspaper circulation by attracting younger or less well-educated readers who don't normally read newspapers". It was written by Sharman DiVono (who herself had martial arts training), and illustrated by Fran Matera (with uncredited assists from Dick Kulpa). (Full article...) Circle of Iron is a 1978 martial arts fantasy film directed by Richard Moore and co-written by Bruce Lee, who intended to star in the film himself, but died before production. The film is also known as The Silent Flute, which was the original title of the story conceived by Lee, James Coburn and Stirling Silliphant in 1969. After Lee's death in 1973, Silliphant and Stanley Mann completed the screenplay, and Lee's part was given to Kung Fu television star David Carradine. Filming began on 28 October 1977 and ended on 20 December 1977. Many other well-known character actors also had small roles in the film, including Roddy McDowall, Eli Wallach and Christopher Lee. (Full article...) The Jeet Kune Do Emblem The taijitu represents the concepts of yin and yang. The Chinese characters mean: "Using no way as way" and "Having no limitation as limitation". The arrows represent the endless interaction between yin and yang. Jeet Kune Do (Chinese: 截拳道; "way of the intercepting fist"; abbreviated JKD) is a hybrid martial art conceived and practiced by martial artist Bruce Lee. It was formed from Lee's experiences in unarmed fighting and self-defense—as well as eclectic, Zen Buddhist and Taoist philosophies—as a new school of martial arts thought. The core of Jeet Kune Do is the interception of the opponent, making corresponding responses or counterattacks that strike at incoming attacks. JKD also incorporates a set of principles to help practitioners make instant decisions and improve the physical and mental self, being intended to have practical applications in life without the traditional routines and metaphysics of conventional martial arts. As an eclectic martial art, it relies on a fighting style heavily influenced by Wing Chun, Tai Chi, taekwondo, boxing, fencing and jujutsu. Bruce Lee himself never formalized Jeet Kune Do before he died. This forced later JKD practitioners to rely upon their own interpretation of the philosophy created by Bruce Lee. (Full article...) Bruce Le (simplified Chinese: 吕小龙; traditional Chinese: 呂小龍; pinyin: Lǚ Xiǎolóng; born June 5, 1950) is a martial artist and actor known for his martial arts film of the 1970s and 1980s. Most of these were inexpensively produced and were made to capitalise on the martial arts phenomenon started by Bruce Lee, whose death in 1973 left a large box office void (hence the name change to "Bruce Le"). Bruce Le was a contract player for the Shaw Brothers, where he appeared in the science fiction opus Infra-Man. He is better known, however, for his Bruce Lee–inspired "tribute" films, also known as "Bruceploitation". (Full article...) This is a list of Bruce Lee's awards and honors. He was a martial artist, an actor, a film director and producer, a screenwriter, an instructor of martial arts, an author, a philosopher, a tai chi practitioner and a cha-cha dancer from the United States and British Hong Kong. (Full article...) Dragon: The Bruce Lee Story is a 1993 American biographical drama film directed by Rob Cohen. The film stars Jason Scott Lee, with a supporting cast including Lauren Holly, Nancy Kwan and Robert Wagner. The film follows the life of actor and martial artist Bruce Lee (Jason) from his relocation to the United States from Hong Kong to his career as a martial arts teacher, and then as a television and film actor. It also focuses on the relationship between Bruce and his wife Linda Lee Cadwell, and the racism to which Bruce was subjected. The primary source of the screenplay is Cadwell's 1975 biography Bruce Lee: The Man Only I Knew. Other sources include Robert Clouse's book Bruce Lee: The Biography and research by Cohen, including interviews with Cadwell and Bruce's son, Brandon Lee. Rather than a traditional biographical film, Cohen decided to include elements of mysticism and to dramatise fight scenes to give it the same tone as the films in which Bruce starred. Dragon was filmed primarily in Hong Kong, Los Angeles and San Francisco. Dragon: The Bruce Lee Story received generally positive reviews, with critics typically finding it entertaining despite criticisms of its veneration of Bruce. Jason was widely praised for his performance. The film was a commercial success and its revenue exceeded box office averages for biographical films, which was attributed to its romantic themes and its appeal to people outside the traditional kung fu film audience. A video game adaptation of the same name was released the following year. Dragon is dedicated to Brandon, who died several weeks before its release. (Full article...) The Legend of Bruce Lee (Chinese: 李小龍傳奇) is a 2008 Chinese biographical television series based on the life story of martial artist and actor Bruce Lee. The 50-episode series was produced and broadcast by CCTV and began airing on October 12, 2008. It was intended to promote Chinese culture alongside the 2008 Beijing Summer Olympics. It stars Hong Kong actor Danny Chan as Bruce Lee and American actress Michelle Lang as Lee's wife, Linda Lee Cadwell. The production period spanned nine months, with filming taking place in China, Hong Kong, Macau, the United States, Italy, and Thailand, and with a budget of 50 million yuan (US$7.3 million). Lee's daughter, Shannon Lee, is credited as executive producer of the series. Other martial artists such as Mark Dacascos, Ray Park, Gary Daniels, Ernest Miller, and Michael Jai White are also featured in the series, playing the roles of martial artists prominent throughout Bruce Lee's life and career. (Full article...) Birth of the Dragon is a 2016 American martial arts action film directed by George Nolfi and written by Christopher Wilkinson and Stephen J. Rivele. The film stars Philip Wan-lung Ng, Xia Yu, Jin Xing, Qu Jingjing, Ron Yuan, and Billy Magnussen. Based on Michael Dorgan's article "Bruce Lee's Toughest Fight", the film is a fictional account on the supposedly true story revolving around Bruce Lee who, as a young martial artist, challenged kung fu master Wong Jack-man in 1965 in San Francisco. Principal photography began in Vancouver, Canada on November 17, 2015. Birth of the Dragon was selected to be screened in the Special Presentations section at the 2016 Toronto International Film Festival, and was released in select theaters on August 25, 2017, by OTL Releasing, BH Tilt and WWE Studios. The film received negative reviews from critics. (Full article...) Martial artist and actor Bruce Lee has been subject to extensive media coverage. (Full article...) Bruce Lee: The Man Only I Knew (ISBN 9780446894074) is a 1975 book about martial arts legend Bruce Lee, written by his widow, Linda Lee Cadwell. (Full article...) China Warrior, known as The Kung Fu (THE 功夫) in Japan, is a beat 'em up video game created in 1987 by Hudson Soft for the PC Engine/TurboGrafx-16. The game received mixed reviews upon release, with praise for its large sprite graphics but criticism towards its gameplay. The game was ported to mobile phones and the Hudson Channel for the PS2 exclusively in Japan with redone graphics, audio, and gameplay. The PC Engine version was also released for the Wii's, Nintendo 3DS's, and Wii U's Virtual Console and on the Japanese PlayStation Store. (Full article...)

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The Way of the Dragon (Chinese: 猛龍過江, originally released in the United States as Return of the Dragon) is a 1972 Hong Kong martial arts action comedy film co-produced and directed by Bruce Lee, who also stars in the lead role. This is Lee's only complete directorial film and the last one released during his lifetime. The film co-stars Nora Miao, Robert Wall, Wei Ping-ou and Chuck Norris (playing his debut screen role). The Way of the Dragon was released in Hong Kong on 30 December 1972, and in the United States in August 1974. The film went on to gross an estimated US$130 million worldwide (equivalent to over $700 million adjusted for inflation), against a tight budget of $130,000, earning a thousand times its budget. It was the highest-grossing Hong Kong film up until Lee's next film Enter the Dragon (1973). The film is primarily set in a restaurant in Rome. The owners are being harassed by a local crime boss, and request help from a relative in Hong Kong. The help arrives in the form of a young martial artist. The conflict between the restaurant staff and the gangsters soon escalates. (Full article...) The Real Bruce Lee, also known as Last Fist of Fury, is a 1977 martial arts documentary. The version of the film that is commonly distributed in the West (USA) on public domain-type DVD and video labels runs 93 minutes in length. The British VHS-version released in 1979 runs 118 minutes. (Full article...) The Bruce Lee Library is composed of books written by or about Bruce Lee (1940-1973), famous Hongkongese and American martial artist, philosopher, author, instructor of martial arts, actor, filmmaker and screenwriter. (Full article...) Dragon: The Bruce Lee Story is a 1993 American biographical drama film directed by Rob Cohen. The film stars Jason Scott Lee, with a supporting cast including Lauren Holly, Nancy Kwan and Robert Wagner. The film follows the life of actor and martial artist Bruce Lee (Jason) from his relocation to the United States from Hong Kong to his career as a martial arts teacher, and then as a television and film actor. It also focuses on the relationship between Bruce and his wife Linda Lee Cadwell, and the racism to which Bruce was subjected. The primary source of the screenplay is Cadwell's 1975 biography Bruce Lee: The Man Only I Knew. Other sources include Robert Clouse's book Bruce Lee: The Biography and research by Cohen, including interviews with Cadwell and Bruce's son, Brandon Lee. Rather than a traditional biographical film, Cohen decided to include elements of mysticism and to dramatise fight scenes to give it the same tone as the films in which Bruce starred. Dragon was filmed primarily in Hong Kong, Los Angeles and San Francisco. Dragon: The Bruce Lee Story received generally positive reviews, with critics typically finding it entertaining despite criticisms of its veneration of Bruce. Jason was widely praised for his performance. The film was a commercial success and its revenue exceeded box office averages for biographical films, which was attributed to its romantic themes and its appeal to people outside the traditional kung fu film audience. A video game adaptation of the same name was released the following year. Dragon is dedicated to Brandon, who died several weeks before its release. (Full article...) Lee Moon-shuen (Chinese: 李滿船; 4 February 1901 – 7 February 1965) known professionally as Lee Hoi-chuen, was a Chinese opera singer and film actor in Hong Kong. He was the father of Bruce Lee, the father-in-law of Linda Lee Cadwell, and the paternal grandfather of Brandon Lee and Shannon Lee. (Full article...) Bruce Lee and I (Chinese: 李小龍與我, released in the United States as Bruce Lee: His Last Days, His Last Nights) is a 1976 Hong Kong biographical action film directed by Lo Mar, and starring Betty Ting Pei and Danny Lee. The film was released in Hong Kong on 9 January 1976. The film is based on Bruce Lee's last days leading up to his death in Pei's apartment at Hong Kong on 20 July 1973. (Full article...) Bruce Lee Lives: The Fall of Hong Kong Palace is a video game published in 1989 by The Software Toolworks for MS-DOS. It included a book titled Dragon's Tale: The Story of Bruce Lee, written by Bruce Lee's wife Linda. (Full article...) Dragon Lee (born 1958) is an actor and practitioner of taekwondo and hapkido. He made a name for himself as a martial arts film star in the 1970s and 80s. His birth name is Moon Kyung-seok, but he is also called Keo Ryong (literally "giant dragon") in South Korea. Lee studied taekwondo with friend and actor Kim Tai-chung, who served as Bruce Lee's double in the final scenes of "Game of Death." It was at this stage of his life that Lee began studying also the Korean martial art of hapkido under Hwang In-shik, who appeared with Bruce Lee in Way of the Dragon. When Dragon Lee was at a theater, a man told him that he resembled Bruce Lee, a big compliment because Bruce Lee was popular at the time. The man knew film directors in Hong Kong and helped Dragon Lee advance his career. (Full article...) Robert Lee Jun-fai (born 16 December 1948) is a Hong Kong musician. He is the younger brother of the late martial artist Bruce Lee. (Full article...) Bruce Lee: The Lost Interview is the name given to the 9 December 1971 edition of The Pierre Berton Show, which featured martial artist/actor Bruce Lee in his only English speaking television interview. Its title is derived from its status; it was presumed lost for several years until its rediscovery and airing on 2 November 1994. Over the course of the interview, which was filmed in Hong Kong, Bruce Lee and Pierre Berton discuss Lee's career, various aspects of martial arts philosophy and the inherent problems faced by an Asian in pursuing stardom in Hollywood. A review of the interview by Bill Stockey said that Bruce Lee's "human side is exposed and he is portrayed as more approachable". (Full article...) China Warrior, known as The Kung Fu (THE 功夫) in Japan, is a beat 'em up video game created in 1987 by Hudson Soft for the PC Engine/TurboGrafx-16. The game received mixed reviews upon release, with praise for its large sprite graphics but criticism towards its gameplay. The game was ported to mobile phones and the Hudson Channel for the PS2 exclusively in Japan with redone graphics, audio, and gameplay. The PC Engine version was also released for the Wii's, Nintendo 3DS's, and Wii U's Virtual Console and on the Japanese PlayStation Store. (Full article...) Bruce Lee's statue in Hong Kong in 2006 The Bruce Lee statue in Hong Kong is a bronze memorial statue of the martial artist Bruce Lee, who died on 20 July 1973 at the age of 32, created by sculptor Cao Chong-en, and located on the Avenue of Stars attraction near the waterfront at Tsim Sha Tsui. (Full article...) Peter Lee Jung-sum (23 October 1939 – 3 September 2008), was a former assistant director of Hong Kong Observatory. He was the elder brother of Bruce Lee. (Full article...) Lee in 2019 Shannon Emery Lee Keasler (born April 19, 1969) is an American actress, businesswoman, singer, and martial artist. She is the only living child of actor and martial artist Bruce Lee and retired martial arts teacher Linda Lee Cadwell, and is the younger sister of actor Brandon Lee. Through Bruce Lee she is a granddaughter of Cantonese opera singer and film actor Lee Hoi-chuen. (Full article...) Bruce Lee: A Dragon Story also known as The Bruce Lee Story, Super Dragon: The Bruce Lee Story and Bruce Lee Story: Super Dragon) is a 1974 Bruceploitation film starring Bruce Li. The film is a loose biopic about martial arts actor Bruce Lee and centers on his supposed affair with actress Betty Ting-Pei. The film is notable for being the first biopic of Bruce Lee (it was released the year following his death), the debut film of notorious Lee imitator Bruce Li, and the first film in the Bruceploitation genre. (Full article...) Chen Zhen (陳真; 陈真; Chén Zhēn; Can4 Zan1) is a fictional character created by Hong Kong writer Ni Kuang. First portrayed by Bruce Lee in the 1972 film Fist of Fury, the character has been the subject of numerous film and television series, including remakes and adaptations of Fist of Fury. Many notable actors, including Jet Li and Donnie Yen, have portrayed Chen Zhen on screen after Bruce Lee. Although Chen Zhen's story varies in the different remakes and adaptations, most have an ending similar to the original Fist of Fury. Chen Zhen is believed to be based on Liu Zhensheng (劉振聲), an apprentice of Huo Yuanjia, a martial artist who lived during the late Qing dynasty of China. (Full article...) Nisei War Memorial, Lake View Cemetery Lake View Cemetery is a private cemetery located in Seattle, Washington, in the Capitol Hill neighborhood, just north of Volunteer Park. Known as "Seattle's Pioneer Cemetery," it is run by an independent, non-profit association. It was founded in 1872 as the Seattle Masonic Cemetery and later renamed for its view of Lake Washington to the east. (Full article...) Lee in 1998 Linda Emery Lee Cadwell (née Emery; born March 21, 1945) is a retired American teacher and writer, the widow of martial artist and actor Bruce Lee (1940–1973), and the mother of actor Brandon Lee (1965–1993) and actress Shannon Lee (born 1969). She is the author of the Bruce Lee biography Bruce Lee: The Man Only I Knew, upon which the film Dragon: The Bruce Lee Story (1993) is based, as well as the founder, a former trustee of, and an unpaid advisor of the Bruce Lee Foundation. (Full article...) Dragon: The Bruce Lee Story is a fighting video game developed and originally published by Virgin Interactive Entertainment in Europe for the Sega Genesis in June 1994. It is based on the 1993 film of the same name, which is a semi-fictionalized account of the life of Hong Kong-American actor and martial artist Bruce Lee. Following the events of the movie, players take control of Bruce Lee across several stages that takes places in different time periods of his life and fight against some of his adversaries. Initially released for Sega platforms, Dragon: The Bruce Lee Story was later ported to the Atari Jaguar and Super Nintendo Entertainment System, each one featuring several changes and additions compared with the original version while both the Game Gear and Master System versions, which were also released in 1994, feature an entirely different gameplay format. Since its release, Dragon: The Bruce Lee Story garnered mostly negative reviews, with criticism directed at the slow-paced and shallow gameplay. (Full article...) Brandon Bruce Lee (February 1, 1965 – March 31, 1993) was an American actor and martial artist. Establishing himself as a rising action star in the early 1990s, he landed his breakthrough role as Eric Draven in the supernatural superhero film The Crow (1994). However, Lee's career and life were cut short by his accidental death during the film's production. Lee was the son of martial artist and film star Bruce Lee, who died when Brandon was eight years old. Lee, who followed in his father's footsteps, trained in martial arts, including Jeet Kun Do, Wing Chun, Eskrima, Silat, and Muay Thai, and studied acting at Emerson College and the Lee Strasberg Theatre and Film Institute. He started his career with leading roles in the Hong Kong action film Legacy of Rage (1986), for which he was nominated for a Hong Kong Film Award for Best New Performer, and the straight-to-video Laser Mission (1989), which was a financial success on home video. Lee also appeared in two spin-offs of the 1970s series Kung Fu, the television film Kung Fu: The Movie (1986) and the pilot Kung Fu: The Next Generation (1987). In 1988, Lee played an antagonist in "What's In a Name", an episode of the American television series Ohara, starring Pat Morita. Transitioning to Hollywood productions, Lee first starred in the Warner Bros buddy cop film Showdown in Little Tokyo (1991), co-starring Dolph Lundgren. While it did not do well with audiences and critics upon its release, it later became a cult film. This was followed by a leading role in Rapid Fire (1992), produced by 20th Century Fox. Lee, alongside Jeff Imada, is also credited for the fight choreography, which contained elements of Jeet Kune Do. Though the film was not well-received, critics praised Lee's onscreen presence. (Full article...) Bruce Lee's Fighting Method is a book of volumes covering Bruce Lee's martial arts abilities of the Jeet Kune Do movement. The book is available as a single hardcover volume or a series of four paperback volumes. The text describes Bruce Lee's Kung Fu fighting techniques, philosophy and training methods. This book was originally written in 1966 by Bruce Lee. However, Lee decided not to publish this work as he feared that instructors would use the fighting knowledge in this text to promote themselves. In 1978, after Bruce Lee's death, his widow Linda Lee Cadwell decided to make available the information on her husband's work. Lee's death changed the perspective of releasing the information that Bruce Lee himself had vacillated about. The book was published with the help of Mitoshi Uyehara. Uyehara was the founder and owner of Black Belt Magazine. During the early years of the publication, Uyehara served as the publisher. Bruce Lee contributed many articles to the publication during the 1960s and a friendship ensued between the two men. Uyehara, a martial artist in his own right, was a key personage in arranging Lee's material for publication. (Full article...) Bruce Le (simplified Chinese: 吕小龙; traditional Chinese: 呂小龍; pinyin: Lǚ Xiǎolóng; born June 5, 1950) is a martial artist and actor known for his martial arts film of the 1970s and 1980s. Most of these were inexpensively produced and were made to capitalise on the martial arts phenomenon started by Bruce Lee, whose death in 1973 left a large box office void (hence the name change to "Bruce Le"). Bruce Le was a contract player for the Shaw Brothers, where he appeared in the science fiction opus Infra-Man. He is better known, however, for his Bruce Lee–inspired "tribute" films, also known as "Bruceploitation". (Full article...) The Game of Death (Chinese: 死亡的遊戲) is an incomplete Hong Kong martial arts film, of which portions were filmed between September and October 1972, directed, written, produced by and starring Bruce Lee. The project was paused to film and produce Enter the Dragon. For The Game of Death, over 120 minutes of footage was shot, which was later misplaced in the Golden Harvest archives. The remaining footage has since been released with Lee's original Cantonese and English dialogue, with John Little dubbing Lee's Hai Tien character as part of the documentary titled Bruce Lee: A Warrior's Journey. Much of the footage that was shot is from what was to be the climax of the film. During filming, Lee received an offer to star in Enter the Dragon, the first kung fu film to be produced by a Hollywood studio (Warner Bros.), and with a budget unprecedented for the genre ($850,000). Lee died of cerebral edema before the film's release. At the time of his death, he had made plans to resume the filming of The Game of Death. After Lee's death, Enter the Dragon director Robert Clouse was enlisted to finish the film using two stand-ins; it was released in 1978 as Game of Death, five years after Lee's death, by Golden Harvest. The story of Lee's original 1972 film involves Lee's character, in order to save his younger sister and brother, joining a group of martial artists who are hired to retrieve a stolen Chinese national treasure from the top floor of a five-story pagoda in South Korea, with each floor guarded by martial artists who must be defeated while ascending the tower. The 1978 film's plot was altered to a revenge story, where the mafia attempts to kill Lee's character, who fakes his death and seeks vengeance against those who tried to kill him. The final part of the film uses some of Lee's original film footage, but with the pagoda setting changed to a restaurant building, where he fights martial artists hired by the mafia in an attempt to rescue his fiancée Ann Morris (played by Colleen Camp). This revised version received a mixed critical reception but was commercially successful, grossing an estimated US$50,000,000 (equivalent to $230,000,000 in 2023) worldwide. (Full article...) Bruceploitation (a portmanteau of "Bruce Lee" and "exploitation") is an exploitation film subgenre that emerged after the death of martial arts film star Bruce Lee in 1973, during which time filmmakers from Hong Kong, Taiwan and South Korea cast Bruce Lee look-alike actors ("Lee-alikes") to star in imitation martial arts films, in order to exploit Lee's sudden international popularity. Bruce Lee look-alike characters also commonly appear in other media, including anime, comic books, manga, and video games. (Full article...)

Outline of underwater diving § Modes of underwater diving

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Recreational scuba diver Scuba diving is a mode of underwater diving whereby divers use breathing equipment that is completely independent of a surface breathing gas supply, and therefore has a limited but variable endurance. The name scuba is an anacronym for "Self-Contained Underwater Breathing Apparatus" and was coined by Christian J. Lambertsen in a patent submitted in 1952. Scuba divers carry their own source of breathing gas, usually compressed air, affording them greater independence and movement than surface-supplied divers, and more time underwater than free divers. Although the use of compressed air is common, a gas blend with a higher oxygen content, known as enriched air or nitrox, has become popular due to the reduced nitrogen intake during long or repetitive dives. Also, breathing gas diluted with helium may be used to reduce the effects of nitrogen narcosis during deeper dives. Open-circuit scuba systems discharge the breathing gas into the environment as it is exhaled, and consist of one or more diving cylinders containing breathing gas at high pressure which is supplied to the diver at ambient pressure through a diving regulator. They may include additional cylinders for range extension, decompression gas or emergency breathing gas. Closed-circuit or semi-closed circuit rebreather scuba systems allow recycling of exhaled gases. The volume of gas used is reduced compared to that of open-circuit, so a smaller cylinder or cylinders may be used for an equivalent dive duration. Rebreathers extend the time spent underwater compared to open-circuit for the same metabolic gas consumption; they produce fewer bubbles and less noise than open-circuit scuba, which makes them attractive to covert military divers to avoid detection, scientific divers to avoid disturbing marine animals, and media divers to avoid bubble interference. Scuba diving may be done recreationally or professionally in a number of applications, including scientific, military and public safety roles, but most commercial diving uses surface-supplied diving equipment when this is practicable. Scuba divers engaged in armed forces covert operations may be referred to as frogmen, combat divers or attack swimmers. A scuba diver primarily moves underwater by using fins attached to the feet, but external propulsion can be provided by a diver propulsion vehicle, or a sled pulled from the surface. Other equipment needed for scuba diving includes a mask to improve underwater vision, exposure protection by means of a diving suit, ballast weights to overcome excess buoyancy, equipment to control buoyancy, and equipment related to the specific circumstances and purpose of the dive, which may include a snorkel when swimming on the surface, a cutting tool to manage entanglement, lights, a dive computer to monitor decompression status, and signalling devices. Scuba divers are trained in the procedures and skills appropriate to their level of certification by diving instructors affiliated to the diver certification organisations which issue these certifications. These include standard operating procedures for using the equipment and dealing with the general hazards of the underwater environment, and emergency procedures for self-help and assistance of a similarly equipped diver experiencing problems. A minimum level of fitness and health is required by most training organisations, but a higher level of fitness may be appropriate for some applications. (Full article...) Saturation diver working on the USS Monitor wreck at 70 m (230 ft) depth. Saturation diving is diving for periods long enough to bring all tissues into equilibrium with the partial pressures of the inert components of the breathing gas used. It is a diving mode that reduces the number of decompressions divers working at great depths must undergo by only decompressing divers once at the end of the diving operation, which may last days to weeks, having them remain under pressure for the whole period. A diver breathing pressurized gas accumulates dissolved inert gas used in the breathing mixture to dilute the oxygen to a non-toxic level in the tissues, which can cause decompression sickness ("the bends") if permitted to come out of solution within the body tissues; hence, returning to the surface safely requires lengthy decompression so that the inert gases can be eliminated via the lungs. Once the dissolved gases in a diver's tissues reach the saturation point, however, decompression time does not increase with further exposure, as no more inert gas is accumulated. Saturation diving takes advantage of this by having divers remain in that saturated state. When not in the water, the divers live in a sealed environment which maintains their pressurised state; this can be an ambient pressure underwater habitat or a saturation system at the surface, with transfer to and from the pressurised living quarters to the equivalent depth underwater via a closed, pressurised diving bell. This may be maintained for up to several weeks, and divers are decompressed to surface pressure only once, at the end of their tour of duty. By limiting the number of decompressions in this way, and using a conservative decompression schedule the risk of decompression sickness is significantly reduced, and the total time spent decompressing is minimised. Saturation divers typically breathe a helium–oxygen mixture to prevent nitrogen narcosis, and limit work of breathing, but at shallow depths saturation diving has been done on nitrox mixtures. Most of the physiological and medical aspects of diving to the same depths are much the same in saturation and bell-bounce ambient pressure diving, or are less of a problem, but there are medical and psychological effects of living under saturation for extended periods. Saturation diving is a specialized form of diving; of the 3,300 commercial divers employed in the United States in 2015, 336 were saturation divers. Special training and certification is required, as the activity is inherently hazardous, and a set of standard operating procedures, emergency procedures, and a range of specialised equipment is used to control the risk, that require consistently correct performance by all the members of an extended diving team. The combination of relatively large skilled personnel requirements, complex engineering, and bulky, heavy equipment required to support a saturation diving project make it an expensive diving mode, but it allows direct human intervention at places that would not otherwise be practical, and where it is applied, it is generally more economically viable than other options, if such exist. (Full article...) Surface-supplied diver at the Monterey Bay Aquarium, Monterey, California Surface-supplied diving is a mode of underwater diving using equipment supplied with breathing gas through a diver's umbilical from the surface, either from the shore or from a diving support vessel, sometimes indirectly via a diving bell. This is different from scuba diving, where the diver's breathing equipment is completely self-contained and there is no essential link to the surface. The primary advantages of conventional surface supplied diving are lower risk of drowning and considerably larger breathing gas supply than scuba, allowing longer working periods and safer decompression. Disadvantages are the absolute limitation on diver mobility imposed by the length of the umbilical, encumbrance by the umbilical, and high logistical and equipment costs compared with scuba. The disadvantages restrict use of this mode of diving to applications where the diver operates within a small area, which is common in commercial diving work. The copper helmeted free-flow standard diving dress is the version which made commercial diving a viable occupation, and although still used in some regions, this heavy equipment has been superseded by lighter free-flow helmets, and to a large extent, lightweight demand helmets, band masks and full-face diving masks. Breathing gases used include air, heliox, nitrox and trimix. Saturation diving is a mode of surface supplied diving in which the divers live under pressure in a saturation system or underwater habitat and are decompressed only at the end of a tour of duty. Airline, or hookah diving, and "compressor diving" are lower technology variants also using a breathing air supply from the surface. (Full article...) Surface-supplied diver at the Monterey Bay Aquarium, Monterey, California Surface-supplied diving is a mode of underwater diving using equipment supplied with breathing gas through a diver's umbilical from the surface, either from the shore or from a diving support vessel, sometimes indirectly via a diving bell. This is different from scuba diving, where the diver's breathing equipment is completely self-contained and there is no essential link to the surface. The primary advantages of conventional surface supplied diving are lower risk of drowning and considerably larger breathing gas supply than scuba, allowing longer working periods and safer decompression. Disadvantages are the absolute limitation on diver mobility imposed by the length of the umbilical, encumbrance by the umbilical, and high logistical and equipment costs compared with scuba. The disadvantages restrict use of this mode of diving to applications where the diver operates within a small area, which is common in commercial diving work. The copper helmeted free-flow standard diving dress is the version which made commercial diving a viable occupation, and although still used in some regions, this heavy equipment has been superseded by lighter free-flow helmets, and to a large extent, lightweight demand helmets, band masks and full-face diving masks. Breathing gases used include air, heliox, nitrox and trimix. Saturation diving is a mode of surface supplied diving in which the divers live under pressure in a saturation system or underwater habitat and are decompressed only at the end of a tour of duty. Airline, or hookah diving, and "compressor diving" are lower technology variants also using a breathing air supply from the surface. (Full article...) Surface-supplied diver at the Monterey Bay Aquarium, Monterey, California Surface-supplied diving is a mode of underwater diving using equipment supplied with breathing gas through a diver's umbilical from the surface, either from the shore or from a diving support vessel, sometimes indirectly via a diving bell. This is different from scuba diving, where the diver's breathing equipment is completely self-contained and there is no essential link to the surface. The primary advantages of conventional surface supplied diving are lower risk of drowning and considerably larger breathing gas supply than scuba, allowing longer working periods and safer decompression. Disadvantages are the absolute limitation on diver mobility imposed by the length of the umbilical, encumbrance by the umbilical, and high logistical and equipment costs compared with scuba. The disadvantages restrict use of this mode of diving to applications where the diver operates within a small area, which is common in commercial diving work. The copper helmeted free-flow standard diving dress is the version which made commercial diving a viable occupation, and although still used in some regions, this heavy equipment has been superseded by lighter free-flow helmets, and to a large extent, lightweight demand helmets, band masks and full-face diving masks. Breathing gases used include air, heliox, nitrox and trimix. Saturation diving is a mode of surface supplied diving in which the divers live under pressure in a saturation system or underwater habitat and are decompressed only at the end of a tour of duty. Airline, or hookah diving, and "compressor diving" are lower technology variants also using a breathing air supply from the surface. (Full article...) Surface-supplied diver at the Monterey Bay Aquarium, Monterey, California Surface-supplied diving is a mode of underwater diving using equipment supplied with breathing gas through a diver's umbilical from the surface, either from the shore or from a diving support vessel, sometimes indirectly via a diving bell. This is different from scuba diving, where the diver's breathing equipment is completely self-contained and there is no essential link to the surface. The primary advantages of conventional surface supplied diving are lower risk of drowning and considerably larger breathing gas supply than scuba, allowing longer working periods and safer decompression. Disadvantages are the absolute limitation on diver mobility imposed by the length of the umbilical, encumbrance by the umbilical, and high logistical and equipment costs compared with scuba. The disadvantages restrict use of this mode of diving to applications where the diver operates within a small area, which is common in commercial diving work. The copper helmeted free-flow standard diving dress is the version which made commercial diving a viable occupation, and although still used in some regions, this heavy equipment has been superseded by lighter free-flow helmets, and to a large extent, lightweight demand helmets, band masks and full-face diving masks. Breathing gases used include air, heliox, nitrox and trimix. Saturation diving is a mode of surface supplied diving in which the divers live under pressure in a saturation system or underwater habitat and are decompressed only at the end of a tour of duty. Airline, or hookah diving, and "compressor diving" are lower technology variants also using a breathing air supply from the surface. (Full article...) Surface-supplied divers riding a stage to the underwater workplace Underwater diving, as a human activity, is the practice of descending below the water's surface to interact with the environment. It is also often referred to as diving, an ambiguous term with several possible meanings, depending on context. Immersion in water and exposure to high ambient pressure have physiological effects that limit the depths and duration possible in ambient pressure diving. Humans are not physiologically and anatomically well-adapted to the environmental conditions of diving, and various equipment has been developed to extend the depth and duration of human dives, and allow different types of work to be done. In ambient pressure diving, the diver is directly exposed to the pressure of the surrounding water. The ambient pressure diver may dive on breath-hold (freediving) or use breathing apparatus for scuba diving or surface-supplied diving, and the saturation diving technique reduces the risk of decompression sickness (DCS) after long-duration deep dives. Atmospheric diving suits (ADS) may be used to isolate the diver from high ambient pressure. Crewed submersibles can extend depth range to full ocean depth, and remotely controlled or robotic machines can reduce risk to humans. The environment exposes the diver to a wide range of hazards, and though the risks are largely controlled by appropriate diving skills, training, types of equipment and breathing gases used depending on the mode, depth and purpose of diving, it remains a relatively dangerous activity. Professional diving is usually regulated by occupational health and safety legislation, while recreational diving may be entirely unregulated. Diving activities are restricted to maximum depths of about 40 metres (130 ft) for recreational scuba diving, 530 metres (1,740 ft) for commercial saturation diving, and 610 metres (2,000 ft) wearing atmospheric suits. Diving is also restricted to conditions which are not excessively hazardous, though the level of risk acceptable can vary, and fatal incidents may occur. Recreational diving (sometimes called sport diving or subaquatics) is a popular leisure activity. Technical diving is a form of recreational diving under more challenging conditions. Professional diving (commercial diving, diving for research purposes, or for financial gain) involves working underwater. Public safety diving is the underwater work done by law enforcement, fire rescue, and underwater search and recovery dive teams. Military diving includes combat diving, clearance diving and ships husbandry. Deep sea diving is underwater diving, usually with surface-supplied equipment, and often refers to the use of standard diving dress with the traditional copper helmet. Hard hat diving is any form of diving with a helmet, including the standard copper helmet, and other forms of free-flow and lightweight demand helmets. The history of breath-hold diving goes back at least to classical times, and there is evidence of prehistoric hunting and gathering of seafoods that may have involved underwater swimming. Technical advances allowing the provision of breathing gas to a diver underwater at ambient pressure are recent, and self-contained breathing systems developed at an accelerated rate following the Second World War. (Full article...) Surface-supplied divers riding a stage to the underwater workplace Underwater diving, as a human activity, is the practice of descending below the water's surface to interact with the environment. It is also often referred to as diving, an ambiguous term with several possible meanings, depending on context. Immersion in water and exposure to high ambient pressure have physiological effects that limit the depths and duration possible in ambient pressure diving. Humans are not physiologically and anatomically well-adapted to the environmental conditions of diving, and various equipment has been developed to extend the depth and duration of human dives, and allow different types of work to be done. In ambient pressure diving, the diver is directly exposed to the pressure of the surrounding water. The ambient pressure diver may dive on breath-hold (freediving) or use breathing apparatus for scuba diving or surface-supplied diving, and the saturation diving technique reduces the risk of decompression sickness (DCS) after long-duration deep dives. Atmospheric diving suits (ADS) may be used to isolate the diver from high ambient pressure. Crewed submersibles can extend depth range to full ocean depth, and remotely controlled or robotic machines can reduce risk to humans. The environment exposes the diver to a wide range of hazards, and though the risks are largely controlled by appropriate diving skills, training, types of equipment and breathing gases used depending on the mode, depth and purpose of diving, it remains a relatively dangerous activity. Professional diving is usually regulated by occupational health and safety legislation, while recreational diving may be entirely unregulated. Diving activities are restricted to maximum depths of about 40 metres (130 ft) for recreational scuba diving, 530 metres (1,740 ft) for commercial saturation diving, and 610 metres (2,000 ft) wearing atmospheric suits. Diving is also restricted to conditions which are not excessively hazardous, though the level of risk acceptable can vary, and fatal incidents may occur. Recreational diving (sometimes called sport diving or subaquatics) is a popular leisure activity. Technical diving is a form of recreational diving under more challenging conditions. Professional diving (commercial diving, diving for research purposes, or for financial gain) involves working underwater. Public safety diving is the underwater work done by law enforcement, fire rescue, and underwater search and recovery dive teams. Military diving includes combat diving, clearance diving and ships husbandry. Deep sea diving is underwater diving, usually with surface-supplied equipment, and often refers to the use of standard diving dress with the traditional copper helmet. Hard hat diving is any form of diving with a helmet, including the standard copper helmet, and other forms of free-flow and lightweight demand helmets. The history of breath-hold diving goes back at least to classical times, and there is evidence of prehistoric hunting and gathering of seafoods that may have involved underwater swimming. Technical advances allowing the provision of breathing gas to a diver underwater at ambient pressure are recent, and self-contained breathing systems developed at an accelerated rate following the Second World War. (Full article...) A freediver on the ocean floor Freediving, free-diving, free diving, breath-hold diving, or skin diving, is a mode of underwater diving that relies on breath-holding until resurfacing rather than the use of breathing apparatus such as scuba gear. Besides the limits of breath-hold, immersion in water and exposure to high ambient pressure also have physiological effects that limit the depths and duration possible in freediving. Examples of freediving activities are traditional fishing techniques, competitive and non-competitive freediving, competitive and non-competitive spearfishing and freediving photography, synchronised swimming, underwater football, underwater rugby, underwater hockey, underwater target shooting and snorkeling. There are also a range of "competitive apnea" disciplines; in which competitors attempt to attain great depths, times, or distances on a single breath. Historically, the term free diving was also used to refer to scuba diving, due to the freedom of movement compared with surface supplied diving. (Full article...) Atmospheric diving suit An atmospheric diving suit (ADS) is a small one-person articulated submersible which resembles a suit of armour, with elaborate pressure joints to allow articulation while maintaining an internal pressure of one atmosphere. An ADS can enable diving at depths of up to 2,300 feet (700 m) for many hours by eliminating the majority of significant physiological dangers associated with deep diving. The occupant of an ADS does not need to decompress, and there is no need for special breathing gas mixtures, so there is little danger of decompression sickness or nitrogen narcosis when the ADS is functioning properly. An ADS can permit less skilled swimmers to complete deep dives, albeit at the expense of dexterity. Atmospheric diving suits in current use include the Newtsuit, Exosuit, Hardsuit and the WASP, all of which are self-contained hard suits that incorporate propulsion units. The Hardsuit is constructed from cast aluminum (forged aluminum in a version constructed for the US Navy for submarine rescue); the upper hull is made from cast aluminum, while the bottom dome is machined aluminum. The WASP is of glass-reinforced plastic (GRP) body tube construction. (Full article...) Surface-supplied diver at the Monterey Bay Aquarium, Monterey, California Surface-supplied diving is a mode of underwater diving using equipment supplied with breathing gas through a diver's umbilical from the surface, either from the shore or from a diving support vessel, sometimes indirectly via a diving bell. This is different from scuba diving, where the diver's breathing equipment is completely self-contained and there is no essential link to the surface. The primary advantages of conventional surface supplied diving are lower risk of drowning and considerably larger breathing gas supply than scuba, allowing longer working periods and safer decompression. Disadvantages are the absolute limitation on diver mobility imposed by the length of the umbilical, encumbrance by the umbilical, and high logistical and equipment costs compared with scuba. The disadvantages restrict use of this mode of diving to applications where the diver operates within a small area, which is common in commercial diving work. The copper helmeted free-flow standard diving dress is the version which made commercial diving a viable occupation, and although still used in some regions, this heavy equipment has been superseded by lighter free-flow helmets, and to a large extent, lightweight demand helmets, band masks and full-face diving masks. Breathing gases used include air, heliox, nitrox and trimix. Saturation diving is a mode of surface supplied diving in which the divers live under pressure in a saturation system or underwater habitat and are decompressed only at the end of a tour of duty. Airline, or hookah diving, and "compressor diving" are lower technology variants also using a breathing air supply from the surface. (Full article...) Surface-supplied diver at the Monterey Bay Aquarium, Monterey, California Surface-supplied diving is a mode of underwater diving using equipment supplied with breathing gas through a diver's umbilical from the surface, either from the shore or from a diving support vessel, sometimes indirectly via a diving bell. This is different from scuba diving, where the diver's breathing equipment is completely self-contained and there is no essential link to the surface. The primary advantages of conventional surface supplied diving are lower risk of drowning and considerably larger breathing gas supply than scuba, allowing longer working periods and safer decompression. Disadvantages are the absolute limitation on diver mobility imposed by the length of the umbilical, encumbrance by the umbilical, and high logistical and equipment costs compared with scuba. The disadvantages restrict use of this mode of diving to applications where the diver operates within a small area, which is common in commercial diving work. The copper helmeted free-flow standard diving dress is the version which made commercial diving a viable occupation, and although still used in some regions, this heavy equipment has been superseded by lighter free-flow helmets, and to a large extent, lightweight demand helmets, band masks and full-face diving masks. Breathing gases used include air, heliox, nitrox and trimix. Saturation diving is a mode of surface supplied diving in which the divers live under pressure in a saturation system or underwater habitat and are decompressed only at the end of a tour of duty. Airline, or hookah diving, and "compressor diving" are lower technology variants also using a breathing air supply from the surface. (Full article...) 2nd Reconnaissance Battalion combat diver training with the Dräger LAR V rebreather Rebreather diving is underwater diving using diving rebreathers, a class of underwater breathing apparatus which recirculate the breathing gas exhaled by the diver after replacing the oxygen used and removing the carbon dioxide metabolic product. Rebreather diving is practiced by recreational, military and scientific divers in applications where it has advantages over open circuit scuba, and surface supply of breathing gas is impracticable. The main advantages of rebreather diving are extended gas endurance, low noise levels, and lack of bubbles. Rebreathers are generally used for scuba applications, but are also occasionally used for bailout systems for surface-supplied diving. Gas reclaim systems used for deep heliox diving use similar technology to rebreathers, as do saturation diving life-support systems, but in these applications the gas recycling equipment is not carried by the diver. Atmospheric diving suits also carry rebreather technology to recycle breathing gas as part of the life-support system, but this article covers the procedures of ambient pressure diving using rebreathers carried by the diver. Rebreathers are generally more complex to use than open circuit scuba, and have more potential points of failure, so acceptably safe use requires a greater level of skill, attention and situational awareness, which is usually derived from understanding the systems, diligent maintenance and overlearning the practical skills of operation and fault recovery. Fault tolerant design can make a rebreather less likely to fail in a way that immediately endangers the user, and reduces the task loading on the diver which in turn may lower the risk of operator error. (Full article...) Recreational scuba diver Scuba diving is a mode of underwater diving whereby divers use breathing equipment that is completely independent of a surface breathing gas supply, and therefore has a limited but variable endurance. The name scuba is an anacronym for "Self-Contained Underwater Breathing Apparatus" and was coined by Christian J. Lambertsen in a patent submitted in 1952. Scuba divers carry their own source of breathing gas, usually compressed air, affording them greater independence and movement than surface-supplied divers, and more time underwater than free divers. Although the use of compressed air is common, a gas blend with a higher oxygen content, known as enriched air or nitrox, has become popular due to the reduced nitrogen intake during long or repetitive dives. Also, breathing gas diluted with helium may be used to reduce the effects of nitrogen narcosis during deeper dives. Open-circuit scuba systems discharge the breathing gas into the environment as it is exhaled, and consist of one or more diving cylinders containing breathing gas at high pressure which is supplied to the diver at ambient pressure through a diving regulator. They may include additional cylinders for range extension, decompression gas or emergency breathing gas. Closed-circuit or semi-closed circuit rebreather scuba systems allow recycling of exhaled gases. The volume of gas used is reduced compared to that of open-circuit, so a smaller cylinder or cylinders may be used for an equivalent dive duration. Rebreathers extend the time spent underwater compared to open-circuit for the same metabolic gas consumption; they produce fewer bubbles and less noise than open-circuit scuba, which makes them attractive to covert military divers to avoid detection, scientific divers to avoid disturbing marine animals, and media divers to avoid bubble interference. Scuba diving may be done recreationally or professionally in a number of applications, including scientific, military and public safety roles, but most commercial diving uses surface-supplied diving equipment when this is practicable. Scuba divers engaged in armed forces covert operations may be referred to as frogmen, combat divers or attack swimmers. A scuba diver primarily moves underwater by using fins attached to the feet, but external propulsion can be provided by a diver propulsion vehicle, or a sled pulled from the surface. Other equipment needed for scuba diving includes a mask to improve underwater vision, exposure protection by means of a diving suit, ballast weights to overcome excess buoyancy, equipment to control buoyancy, and equipment related to the specific circumstances and purpose of the dive, which may include a snorkel when swimming on the surface, a cutting tool to manage entanglement, lights, a dive computer to monitor decompression status, and signalling devices. Scuba divers are trained in the procedures and skills appropriate to their level of certification by diving instructors affiliated to the diver certification organisations which issue these certifications. These include standard operating procedures for using the equipment and dealing with the general hazards of the underwater environment, and emergency procedures for self-help and assistance of a similarly equipped diver experiencing problems. A minimum level of fitness and health is required by most training organisations, but a higher level of fitness may be appropriate for some applications. (Full article...)

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Atmospheric diving suit An atmospheric diving suit (ADS) is a small one-person articulated submersible which resembles a suit of armour, with elaborate pressure joints to allow articulation while maintaining an internal pressure of one atmosphere. An ADS can enable diving at depths of up to 2,300 feet (700 m) for many hours by eliminating the majority of significant physiological dangers associated with deep diving. The occupant of an ADS does not need to decompress, and there is no need for special breathing gas mixtures, so there is little danger of decompression sickness or nitrogen narcosis when the ADS is functioning properly. An ADS can permit less skilled swimmers to complete deep dives, albeit at the expense of dexterity. Atmospheric diving suits in current use include the Newtsuit, Exosuit, Hardsuit and the WASP, all of which are self-contained hard suits that incorporate propulsion units. The Hardsuit is constructed from cast aluminum (forged aluminum in a version constructed for the US Navy for submarine rescue); the upper hull is made from cast aluminum, while the bottom dome is machined aluminum. The WASP is of glass-reinforced plastic (GRP) body tube construction. (Full article...) 2nd Reconnaissance Battalion combat diver training with the Dräger LAR V rebreather Rebreather diving is underwater diving using diving rebreathers, a class of underwater breathing apparatus which recirculate the breathing gas exhaled by the diver after replacing the oxygen used and removing the carbon dioxide metabolic product. Rebreather diving is practiced by recreational, military and scientific divers in applications where it has advantages over open circuit scuba, and surface supply of breathing gas is impracticable. The main advantages of rebreather diving are extended gas endurance, low noise levels, and lack of bubbles. Rebreathers are generally used for scuba applications, but are also occasionally used for bailout systems for surface-supplied diving. Gas reclaim systems used for deep heliox diving use similar technology to rebreathers, as do saturation diving life-support systems, but in these applications the gas recycling equipment is not carried by the diver. Atmospheric diving suits also carry rebreather technology to recycle breathing gas as part of the life-support system, but this article covers the procedures of ambient pressure diving using rebreathers carried by the diver. Rebreathers are generally more complex to use than open circuit scuba, and have more potential points of failure, so acceptably safe use requires a greater level of skill, attention and situational awareness, which is usually derived from understanding the systems, diligent maintenance and overlearning the practical skills of operation and fault recovery. Fault tolerant design can make a rebreather less likely to fail in a way that immediately endangers the user, and reduces the task loading on the diver which in turn may lower the risk of operator error. (Full article...) Surface-supplied diver at the Monterey Bay Aquarium, Monterey, California Surface-supplied diving is a mode of underwater diving using equipment supplied with breathing gas through a diver's umbilical from the surface, either from the shore or from a diving support vessel, sometimes indirectly via a diving bell. This is different from scuba diving, where the diver's breathing equipment is completely self-contained and there is no essential link to the surface. The primary advantages of conventional surface supplied diving are lower risk of drowning and considerably larger breathing gas supply than scuba, allowing longer working periods and safer decompression. Disadvantages are the absolute limitation on diver mobility imposed by the length of the umbilical, encumbrance by the umbilical, and high logistical and equipment costs compared with scuba. The disadvantages restrict use of this mode of diving to applications where the diver operates within a small area, which is common in commercial diving work. The copper helmeted free-flow standard diving dress is the version which made commercial diving a viable occupation, and although still used in some regions, this heavy equipment has been superseded by lighter free-flow helmets, and to a large extent, lightweight demand helmets, band masks and full-face diving masks. Breathing gases used include air, heliox, nitrox and trimix. Saturation diving is a mode of surface supplied diving in which the divers live under pressure in a saturation system or underwater habitat and are decompressed only at the end of a tour of duty. Airline, or hookah diving, and "compressor diving" are lower technology variants also using a breathing air supply from the surface. (Full article...) Surface-supplied diver at the Monterey Bay Aquarium, Monterey, California Surface-supplied diving is a mode of underwater diving using equipment supplied with breathing gas through a diver's umbilical from the surface, either from the shore or from a diving support vessel, sometimes indirectly via a diving bell. This is different from scuba diving, where the diver's breathing equipment is completely self-contained and there is no essential link to the surface. The primary advantages of conventional surface supplied diving are lower risk of drowning and considerably larger breathing gas supply than scuba, allowing longer working periods and safer decompression. Disadvantages are the absolute limitation on diver mobility imposed by the length of the umbilical, encumbrance by the umbilical, and high logistical and equipment costs compared with scuba. The disadvantages restrict use of this mode of diving to applications where the diver operates within a small area, which is common in commercial diving work. The copper helmeted free-flow standard diving dress is the version which made commercial diving a viable occupation, and although still used in some regions, this heavy equipment has been superseded by lighter free-flow helmets, and to a large extent, lightweight demand helmets, band masks and full-face diving masks. Breathing gases used include air, heliox, nitrox and trimix. Saturation diving is a mode of surface supplied diving in which the divers live under pressure in a saturation system or underwater habitat and are decompressed only at the end of a tour of duty. Airline, or hookah diving, and "compressor diving" are lower technology variants also using a breathing air supply from the surface. (Full article...) Recreational scuba diver Scuba diving is a mode of underwater diving whereby divers use breathing equipment that is completely independent of a surface breathing gas supply, and therefore has a limited but variable endurance. The name scuba is an anacronym for "Self-Contained Underwater Breathing Apparatus" and was coined by Christian J. Lambertsen in a patent submitted in 1952. Scuba divers carry their own source of breathing gas, usually compressed air, affording them greater independence and movement than surface-supplied divers, and more time underwater than free divers. Although the use of compressed air is common, a gas blend with a higher oxygen content, known as enriched air or nitrox, has become popular due to the reduced nitrogen intake during long or repetitive dives. Also, breathing gas diluted with helium may be used to reduce the effects of nitrogen narcosis during deeper dives. Open-circuit scuba systems discharge the breathing gas into the environment as it is exhaled, and consist of one or more diving cylinders containing breathing gas at high pressure which is supplied to the diver at ambient pressure through a diving regulator. They may include additional cylinders for range extension, decompression gas or emergency breathing gas. Closed-circuit or semi-closed circuit rebreather scuba systems allow recycling of exhaled gases. The volume of gas used is reduced compared to that of open-circuit, so a smaller cylinder or cylinders may be used for an equivalent dive duration. Rebreathers extend the time spent underwater compared to open-circuit for the same metabolic gas consumption; they produce fewer bubbles and less noise than open-circuit scuba, which makes them attractive to covert military divers to avoid detection, scientific divers to avoid disturbing marine animals, and media divers to avoid bubble interference. Scuba diving may be done recreationally or professionally in a number of applications, including scientific, military and public safety roles, but most commercial diving uses surface-supplied diving equipment when this is practicable. Scuba divers engaged in armed forces covert operations may be referred to as frogmen, combat divers or attack swimmers. A scuba diver primarily moves underwater by using fins attached to the feet, but external propulsion can be provided by a diver propulsion vehicle, or a sled pulled from the surface. Other equipment needed for scuba diving includes a mask to improve underwater vision, exposure protection by means of a diving suit, ballast weights to overcome excess buoyancy, equipment to control buoyancy, and equipment related to the specific circumstances and purpose of the dive, which may include a snorkel when swimming on the surface, a cutting tool to manage entanglement, lights, a dive computer to monitor decompression status, and signalling devices. Scuba divers are trained in the procedures and skills appropriate to their level of certification by diving instructors affiliated to the diver certification organisations which issue these certifications. These include standard operating procedures for using the equipment and dealing with the general hazards of the underwater environment, and emergency procedures for self-help and assistance of a similarly equipped diver experiencing problems. A minimum level of fitness and health is required by most training organisations, but a higher level of fitness may be appropriate for some applications. (Full article...) A freediver on the ocean floor Freediving, free-diving, free diving, breath-hold diving, or skin diving, is a mode of underwater diving that relies on breath-holding until resurfacing rather than the use of breathing apparatus such as scuba gear. Besides the limits of breath-hold, immersion in water and exposure to high ambient pressure also have physiological effects that limit the depths and duration possible in freediving. Examples of freediving activities are traditional fishing techniques, competitive and non-competitive freediving, competitive and non-competitive spearfishing and freediving photography, synchronised swimming, underwater football, underwater rugby, underwater hockey, underwater target shooting and snorkeling. There are also a range of "competitive apnea" disciplines; in which competitors attempt to attain great depths, times, or distances on a single breath. Historically, the term free diving was also used to refer to scuba diving, due to the freedom of movement compared with surface supplied diving. (Full article...) Surface-supplied divers riding a stage to the underwater workplace Underwater diving, as a human activity, is the practice of descending below the water's surface to interact with the environment. It is also often referred to as diving, an ambiguous term with several possible meanings, depending on context. Immersion in water and exposure to high ambient pressure have physiological effects that limit the depths and duration possible in ambient pressure diving. Humans are not physiologically and anatomically well-adapted to the environmental conditions of diving, and various equipment has been developed to extend the depth and duration of human dives, and allow different types of work to be done. In ambient pressure diving, the diver is directly exposed to the pressure of the surrounding water. The ambient pressure diver may dive on breath-hold (freediving) or use breathing apparatus for scuba diving or surface-supplied diving, and the saturation diving technique reduces the risk of decompression sickness (DCS) after long-duration deep dives. Atmospheric diving suits (ADS) may be used to isolate the diver from high ambient pressure. Crewed submersibles can extend depth range to full ocean depth, and remotely controlled or robotic machines can reduce risk to humans. The environment exposes the diver to a wide range of hazards, and though the risks are largely controlled by appropriate diving skills, training, types of equipment and breathing gases used depending on the mode, depth and purpose of diving, it remains a relatively dangerous activity. Professional diving is usually regulated by occupational health and safety legislation, while recreational diving may be entirely unregulated. Diving activities are restricted to maximum depths of about 40 metres (130 ft) for recreational scuba diving, 530 metres (1,740 ft) for commercial saturation diving, and 610 metres (2,000 ft) wearing atmospheric suits. Diving is also restricted to conditions which are not excessively hazardous, though the level of risk acceptable can vary, and fatal incidents may occur. Recreational diving (sometimes called sport diving or subaquatics) is a popular leisure activity. Technical diving is a form of recreational diving under more challenging conditions. Professional diving (commercial diving, diving for research purposes, or for financial gain) involves working underwater. Public safety diving is the underwater work done by law enforcement, fire rescue, and underwater search and recovery dive teams. Military diving includes combat diving, clearance diving and ships husbandry. Deep sea diving is underwater diving, usually with surface-supplied equipment, and often refers to the use of standard diving dress with the traditional copper helmet. Hard hat diving is any form of diving with a helmet, including the standard copper helmet, and other forms of free-flow and lightweight demand helmets. The history of breath-hold diving goes back at least to classical times, and there is evidence of prehistoric hunting and gathering of seafoods that may have involved underwater swimming. Technical advances allowing the provision of breathing gas to a diver underwater at ambient pressure are recent, and self-contained breathing systems developed at an accelerated rate following the Second World War. (Full article...) Surface-supplied diver at the Monterey Bay Aquarium, Monterey, California Surface-supplied diving is a mode of underwater diving using equipment supplied with breathing gas through a diver's umbilical from the surface, either from the shore or from a diving support vessel, sometimes indirectly via a diving bell. This is different from scuba diving, where the diver's breathing equipment is completely self-contained and there is no essential link to the surface. The primary advantages of conventional surface supplied diving are lower risk of drowning and considerably larger breathing gas supply than scuba, allowing longer working periods and safer decompression. Disadvantages are the absolute limitation on diver mobility imposed by the length of the umbilical, encumbrance by the umbilical, and high logistical and equipment costs compared with scuba. The disadvantages restrict use of this mode of diving to applications where the diver operates within a small area, which is common in commercial diving work. The copper helmeted free-flow standard diving dress is the version which made commercial diving a viable occupation, and although still used in some regions, this heavy equipment has been superseded by lighter free-flow helmets, and to a large extent, lightweight demand helmets, band masks and full-face diving masks. Breathing gases used include air, heliox, nitrox and trimix. Saturation diving is a mode of surface supplied diving in which the divers live under pressure in a saturation system or underwater habitat and are decompressed only at the end of a tour of duty. Airline, or hookah diving, and "compressor diving" are lower technology variants also using a breathing air supply from the surface. (Full article...) Surface-supplied divers riding a stage to the underwater workplace Underwater diving, as a human activity, is the practice of descending below the water's surface to interact with the environment. It is also often referred to as diving, an ambiguous term with several possible meanings, depending on context. Immersion in water and exposure to high ambient pressure have physiological effects that limit the depths and duration possible in ambient pressure diving. Humans are not physiologically and anatomically well-adapted to the environmental conditions of diving, and various equipment has been developed to extend the depth and duration of human dives, and allow different types of work to be done. In ambient pressure diving, the diver is directly exposed to the pressure of the surrounding water. The ambient pressure diver may dive on breath-hold (freediving) or use breathing apparatus for scuba diving or surface-supplied diving, and the saturation diving technique reduces the risk of decompression sickness (DCS) after long-duration deep dives. Atmospheric diving suits (ADS) may be used to isolate the diver from high ambient pressure. Crewed submersibles can extend depth range to full ocean depth, and remotely controlled or robotic machines can reduce risk to humans. The environment exposes the diver to a wide range of hazards, and though the risks are largely controlled by appropriate diving skills, training, types of equipment and breathing gases used depending on the mode, depth and purpose of diving, it remains a relatively dangerous activity. Professional diving is usually regulated by occupational health and safety legislation, while recreational diving may be entirely unregulated. Diving activities are restricted to maximum depths of about 40 metres (130 ft) for recreational scuba diving, 530 metres (1,740 ft) for commercial saturation diving, and 610 metres (2,000 ft) wearing atmospheric suits. Diving is also restricted to conditions which are not excessively hazardous, though the level of risk acceptable can vary, and fatal incidents may occur. Recreational diving (sometimes called sport diving or subaquatics) is a popular leisure activity. Technical diving is a form of recreational diving under more challenging conditions. Professional diving (commercial diving, diving for research purposes, or for financial gain) involves working underwater. Public safety diving is the underwater work done by law enforcement, fire rescue, and underwater search and recovery dive teams. Military diving includes combat diving, clearance diving and ships husbandry. Deep sea diving is underwater diving, usually with surface-supplied equipment, and often refers to the use of standard diving dress with the traditional copper helmet. Hard hat diving is any form of diving with a helmet, including the standard copper helmet, and other forms of free-flow and lightweight demand helmets. The history of breath-hold diving goes back at least to classical times, and there is evidence of prehistoric hunting and gathering of seafoods that may have involved underwater swimming. Technical advances allowing the provision of breathing gas to a diver underwater at ambient pressure are recent, and self-contained breathing systems developed at an accelerated rate following the Second World War. (Full article...) Surface-supplied diver at the Monterey Bay Aquarium, Monterey, California Surface-supplied diving is a mode of underwater diving using equipment supplied with breathing gas through a diver's umbilical from the surface, either from the shore or from a diving support vessel, sometimes indirectly via a diving bell. This is different from scuba diving, where the diver's breathing equipment is completely self-contained and there is no essential link to the surface. The primary advantages of conventional surface supplied diving are lower risk of drowning and considerably larger breathing gas supply than scuba, allowing longer working periods and safer decompression. Disadvantages are the absolute limitation on diver mobility imposed by the length of the umbilical, encumbrance by the umbilical, and high logistical and equipment costs compared with scuba. The disadvantages restrict use of this mode of diving to applications where the diver operates within a small area, which is common in commercial diving work. The copper helmeted free-flow standard diving dress is the version which made commercial diving a viable occupation, and although still used in some regions, this heavy equipment has been superseded by lighter free-flow helmets, and to a large extent, lightweight demand helmets, band masks and full-face diving masks. Breathing gases used include air, heliox, nitrox and trimix. Saturation diving is a mode of surface supplied diving in which the divers live under pressure in a saturation system or underwater habitat and are decompressed only at the end of a tour of duty. Airline, or hookah diving, and "compressor diving" are lower technology variants also using a breathing air supply from the surface. (Full article...) Saturation diver working on the USS Monitor wreck at 70 m (230 ft) depth. Saturation diving is diving for periods long enough to bring all tissues into equilibrium with the partial pressures of the inert components of the breathing gas used. It is a diving mode that reduces the number of decompressions divers working at great depths must undergo by only decompressing divers once at the end of the diving operation, which may last days to weeks, having them remain under pressure for the whole period. A diver breathing pressurized gas accumulates dissolved inert gas used in the breathing mixture to dilute the oxygen to a non-toxic level in the tissues, which can cause decompression sickness ("the bends") if permitted to come out of solution within the body tissues; hence, returning to the surface safely requires lengthy decompression so that the inert gases can be eliminated via the lungs. Once the dissolved gases in a diver's tissues reach the saturation point, however, decompression time does not increase with further exposure, as no more inert gas is accumulated. Saturation diving takes advantage of this by having divers remain in that saturated state. When not in the water, the divers live in a sealed environment which maintains their pressurised state; this can be an ambient pressure underwater habitat or a saturation system at the surface, with transfer to and from the pressurised living quarters to the equivalent depth underwater via a closed, pressurised diving bell. This may be maintained for up to several weeks, and divers are decompressed to surface pressure only once, at the end of their tour of duty. By limiting the number of decompressions in this way, and using a conservative decompression schedule the risk of decompression sickness is significantly reduced, and the total time spent decompressing is minimised. Saturation divers typically breathe a helium–oxygen mixture to prevent nitrogen narcosis, and limit work of breathing, but at shallow depths saturation diving has been done on nitrox mixtures. Most of the physiological and medical aspects of diving to the same depths are much the same in saturation and bell-bounce ambient pressure diving, or are less of a problem, but there are medical and psychological effects of living under saturation for extended periods. Saturation diving is a specialized form of diving; of the 3,300 commercial divers employed in the United States in 2015, 336 were saturation divers. Special training and certification is required, as the activity is inherently hazardous, and a set of standard operating procedures, emergency procedures, and a range of specialised equipment is used to control the risk, that require consistently correct performance by all the members of an extended diving team. The combination of relatively large skilled personnel requirements, complex engineering, and bulky, heavy equipment required to support a saturation diving project make it an expensive diving mode, but it allows direct human intervention at places that would not otherwise be practical, and where it is applied, it is generally more economically viable than other options, if such exist. (Full article...) Surface-supplied diver at the Monterey Bay Aquarium, Monterey, California Surface-supplied diving is a mode of underwater diving using equipment supplied with breathing gas through a diver's umbilical from the surface, either from the shore or from a diving support vessel, sometimes indirectly via a diving bell. This is different from scuba diving, where the diver's breathing equipment is completely self-contained and there is no essential link to the surface. The primary advantages of conventional surface supplied diving are lower risk of drowning and considerably larger breathing gas supply than scuba, allowing longer working periods and safer decompression. Disadvantages are the absolute limitation on diver mobility imposed by the length of the umbilical, encumbrance by the umbilical, and high logistical and equipment costs compared with scuba. The disadvantages restrict use of this mode of diving to applications where the diver operates within a small area, which is common in commercial diving work. The copper helmeted free-flow standard diving dress is the version which made commercial diving a viable occupation, and although still used in some regions, this heavy equipment has been superseded by lighter free-flow helmets, and to a large extent, lightweight demand helmets, band masks and full-face diving masks. Breathing gases used include air, heliox, nitrox and trimix. Saturation diving is a mode of surface supplied diving in which the divers live under pressure in a saturation system or underwater habitat and are decompressed only at the end of a tour of duty. Airline, or hookah diving, and "compressor diving" are lower technology variants also using a breathing air supply from the surface. (Full article...) Recreational scuba diver Scuba diving is a mode of underwater diving whereby divers use breathing equipment that is completely independent of a surface breathing gas supply, and therefore has a limited but variable endurance. The name scuba is an anacronym for "Self-Contained Underwater Breathing Apparatus" and was coined by Christian J. Lambertsen in a patent submitted in 1952. Scuba divers carry their own source of breathing gas, usually compressed air, affording them greater independence and movement than surface-supplied divers, and more time underwater than free divers. Although the use of compressed air is common, a gas blend with a higher oxygen content, known as enriched air or nitrox, has become popular due to the reduced nitrogen intake during long or repetitive dives. Also, breathing gas diluted with helium may be used to reduce the effects of nitrogen narcosis during deeper dives. Open-circuit scuba systems discharge the breathing gas into the environment as it is exhaled, and consist of one or more diving cylinders containing breathing gas at high pressure which is supplied to the diver at ambient pressure through a diving regulator. They may include additional cylinders for range extension, decompression gas or emergency breathing gas. Closed-circuit or semi-closed circuit rebreather scuba systems allow recycling of exhaled gases. The volume of gas used is reduced compared to that of open-circuit, so a smaller cylinder or cylinders may be used for an equivalent dive duration. Rebreathers extend the time spent underwater compared to open-circuit for the same metabolic gas consumption; they produce fewer bubbles and less noise than open-circuit scuba, which makes them attractive to covert military divers to avoid detection, scientific divers to avoid disturbing marine animals, and media divers to avoid bubble interference. Scuba diving may be done recreationally or professionally in a number of applications, including scientific, military and public safety roles, but most commercial diving uses surface-supplied diving equipment when this is practicable. Scuba divers engaged in armed forces covert operations may be referred to as frogmen, combat divers or attack swimmers. A scuba diver primarily moves underwater by using fins attached to the feet, but external propulsion can be provided by a diver propulsion vehicle, or a sled pulled from the surface. Other equipment needed for scuba diving includes a mask to improve underwater vision, exposure protection by means of a diving suit, ballast weights to overcome excess buoyancy, equipment to control buoyancy, and equipment related to the specific circumstances and purpose of the dive, which may include a snorkel when swimming on the surface, a cutting tool to manage entanglement, lights, a dive computer to monitor decompression status, and signalling devices. Scuba divers are trained in the procedures and skills appropriate to their level of certification by diving instructors affiliated to the diver certification organisations which issue these certifications. These include standard operating procedures for using the equipment and dealing with the general hazards of the underwater environment, and emergency procedures for self-help and assistance of a similarly equipped diver experiencing problems. A minimum level of fitness and health is required by most training organisations, but a higher level of fitness may be appropriate for some applications. (Full article...) Surface-supplied diver at the Monterey Bay Aquarium, Monterey, California Surface-supplied diving is a mode of underwater diving using equipment supplied with breathing gas through a diver's umbilical from the surface, either from the shore or from a diving support vessel, sometimes indirectly via a diving bell. This is different from scuba diving, where the diver's breathing equipment is completely self-contained and there is no essential link to the surface. The primary advantages of conventional surface supplied diving are lower risk of drowning and considerably larger breathing gas supply than scuba, allowing longer working periods and safer decompression. Disadvantages are the absolute limitation on diver mobility imposed by the length of the umbilical, encumbrance by the umbilical, and high logistical and equipment costs compared with scuba. The disadvantages restrict use of this mode of diving to applications where the diver operates within a small area, which is common in commercial diving work. The copper helmeted free-flow standard diving dress is the version which made commercial diving a viable occupation, and although still used in some regions, this heavy equipment has been superseded by lighter free-flow helmets, and to a large extent, lightweight demand helmets, band masks and full-face diving masks. Breathing gases used include air, heliox, nitrox and trimix. Saturation diving is a mode of surface supplied diving in which the divers live under pressure in a saturation system or underwater habitat and are decompressed only at the end of a tour of duty. Airline, or hookah diving, and "compressor diving" are lower technology variants also using a breathing air supply from the surface. (Full article...)

References

This section contains references and notes. It should be empty.