American physical chemist and Nobel laureate (1935) who, along with Stanley Miller, carried out research into the possible make-up of Earth's primeval atmosphere and prebiotic evolution. During the birth of the space age in the 1950s, he was a major proponent of solar system exploration and the search for extraterrestrial life, becoming involved with the Apollo and Viking missions. He also investigated organic matter in meteorites.
Reference
Urey, H. C. The Planets: Their Origin and Development. New Haven, Conn.: Yale University Press (1952).