george gaylord simpson

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born June 16, 1902, Chicago, Ill., U.S. died Oct. 6, 1984, Tucson, Ariz. U.S. paleontologist. He earned a doctorate at Yale University. His contributions to evolutionary theory include a detailed classification of mammals, based on his studies of mammalian evolution, which is still the standard. He also is known for his studies of intercontinental migrations of animal species, especially South American mammals, in past geologic times. His books include Tempo and Mode in Evolution (1944; 1984), The Meaning of Evolution (1949), The Major Features of Evolution (1953), and The Principles of Animal Taxonomy (1961)

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George Gay·lord simpson

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