Today in Science History

From Today in Science History:

George Gaylord Simpson (Died 6 Oct 1984; born 16 June 1902). U.S. paleontologist known for his contributions to evolutionary theory and to the understanding of intercontinental migrations of animal species in past geological times. Simpson specialized in early fossil mammals, leading expeditions on four continents and discovering in 1953 the 50-million-year old fossil skulls of dawn horses in Colorado. He helped develop the modern biological theory of evolution, drawing on paleontology, genetics, ecology, and natural selection to show that evolution occurs as a result of natural selection operating in response to shifting environmental conditions. He spent most of his career as a paleontologist at the American Museum of Natural History.

Bernard-Germain-Étienne Lacépède (Died 6 Oct 1825; born 26 Dec 1756). (Bernard-Germain-) Étienne de La Ville-sur-Illon, comte de (count of) Lacépède, was a French naturalist interested in herpetology and ichthyology. Buffon secured him a position at the Jardin du Roi (later the Jardin des Plantes) and invited him to continue his work Histoire Naturelle in animal classification. To supplement Buffon’s work, Lacépède published several volumes which dealt with the oviparous quadrupeds (1788), reptiles (1789), fishes (1798-1803), and whales (1804). After the French Revolution, he became a politician, which activity prevented him making any further contribution of importance to science.

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