Lucy Merriam, a child model and actress known for role as Emma Lavery on the American soap operaAll My Children. Child models are used for a wide variety of commercial purposes, often because they evoke a sense of innocence or vulnerability. The visible success of child models who become media celebrities has led numerous children (and their parents) to pursue modeling as a part-time career.Photo: Merriam family
The head of a flesh-fly, a family of flies. Flies have a mobile head with eyes, and, in most cases, have large compound eyes on the sides of the head, with five small ocelli on the top. The antennae take a variety of forms, but are often short, to reduce drag while flying. Fly mouths do not contain teeth or anything else that would allow them to eat solid foods.Photo: JJ Harrison
The Let L-410 Turbolet is a twin-engined short-range transport aircraft, manufactured by the Czech aircraft manufacturer LET, mostly used for passenger transport. The L-410 first flew in 1969, and with more than 1100 produced, is the most popular 19-seat plane in history.Photo: Łukasz Golowanow
The Masked Lapwing (Vanellus miles, ssp.novaehollandiae shown), also known as the Spur-winged Plover, is a common and conspicuous bird native to northern and eastern Australia, as well as New Zealand. They are most common around the edges of wetlands and in other moist, open environments, but are adaptable and can often be found in surprisingly arid areas.Photo: JJ Harrison
An illustration explaining how antigenic shift can occur in the influenza virus. Antigenic shift occurs when two or more different strains of one or more viruses combine to form a new subtype having a mixture of each original virus's surface antigens. The process may occur in any number of viruses, but influenza is the best-known example. Antigenic shift is a specific case of reassortment or viral shift that confers a phenotypic change, and should not be confused with antigenic drift, which is the natural mutation over time of known viral strains.
With almost 450 described species, Pergidae (Perga sp. larva pictured) is the third-largest family of sawflies. The majority of Pergidae species occur in South America and Australia. They are the dominant family in Australia and are one of the major families in the Neotropics.Photo: JJ Harrison
A female Common Blackbird (Turdus merula) in her nest. Cup nests like the one shown here, usually made of pliable materials like grasses, are commonly built by passerines. Other types of nests include the knot-hole left by a broken branch, a burrow dug into the ground, a chamber drilled into a tree, an enormous rotting pile of vegetation and earth, or a mud dome with an entrance tunnel.Photo: JJ Harrison
A 1925 photo of Wongudan, an altar site in Seoul built in 1897 as a location for the performance of the rite of heaven. KingSeongjong of the Goryeo Dynasty was the first to perform the rite, designed to ensure a bountiful harvest, in the tenth century. The practice was discontinued by later Goryeo kings, revived briefly in the mid fifteenth century by Sejo of the Joseon Dynasty, then reinstated with the founding of the Korean Empire in 1897. Much of the altar complex was destroyed during the Japanese occupation, and the gate and fountain seen here were also subsequently removed, leaving only the three-storey Hwangungu pagoda remaining.Photo: Burton Holmes; Restoration: Lise Broer