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3 (three) is a number, numeral and digit. It is the natural number following 2 and preceding 4, and is the smallest odd prime number and the only prime...

A Uniform Resource Identifier (URI), formerly Universal Resource Identifier, is a unique sequence of characters that identifies an abstract or physical...

In set theory, Zermelo–Fraenkel set theory, named after mathematicians Ernst Zermelo and Abraham Fraenkel, is an axiomatic system that was proposed in...

The evolution of fish began about 530 million years ago during the Cambrian explosion. It was during this time that the early chordates developed the skull...

The Blanding's turtle (Emydoidea blandingii) is a semi-aquatic turtle of the family Emydidae. This species is native to central and eastern parts of Canada...

The scalp is the area of the head where head hair grows. It is made up of skin, layers of connective and fibrous tissues, and the membrane of the skull...

The Declared Rare and Priority Flora List is the system by which Western Australia's conservation flora are given a priority. Developed by the Government...

Princess Elizabeth Land is the sector of Antarctica between longitude 73° east and Cape Penck (at 87°43' east). The sector is claimed by Australia as part...

Adocus is an extinct genus of aquatic turtles belonging to the family Adocidae. Species of the genus Adocus had flattened and smoothly contoured shells...

STS-122 was a NASA Space Shuttle mission to the International Space Station (ISS), flown by the Space Shuttle Atlantis. STS-122 marked the 24th shuttle...

STS-124 was a Space Shuttle mission, flown by Space Shuttle Discovery to the International Space Station. Discovery launched on May 31, 2008, at 17:02...

In logic, extensionality, or extensional equality, refers to principles that judge objects to be equal if they have the same external properties. It stands...

The Republic XF-103 was an American project to develop a powerful missile-armed interceptor aircraft capable of destroying Soviet bombers while flying...

A stopper, bung, or cork is a cylindrical or conical closure used to seal a container, such as a bottle, tube, or barrel. Unlike a lid or bottle cap, which...

Hierarchical modulation, also called layered modulation, is one of the signal processing techniques for multiplexing and modulating multiple data streams...

Underbalanced drilling, or UBD, is a procedure used to drill oil and gas wells where the pressure in the wellbore is kept lower than the static pressure...

The PowerBook 190 and its companion PowerBook 190cs are laptop computers manufactured by Apple Computer as part of their PowerBook brand, introduced to...

Helicopter Maritime Strike Squadron 73 (HSM-73) is a United States Navy Maritime Strike helicopter squadron based on Naval Air Station North Island, California...

In mathematics, especially in abstract algebra, a quasigroup is an algebraic structure resembling a group in the sense that "division" is always possible...

Destiny in Space is a 70mm Canadian-American IMAX documentary film released in 1994. The film was written by Toni Myers, directed by Academy Award-winner...