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A rill in a barnyard and the Grand Canyon represent, in the main, stages of valley erosion that began some millions of years apart.
George Gaylord Simpson
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Autumn burned brightly, a running flame through the mountains, a torch flung to the trees.
Faith Baldwin
George Gaylord Simpson
Born:
June 16, 1902
Died:
October 6, 1984
(aged 82)
Bio:
George Gaylord Simpson was an American paleontologist.
Known for:
Tempo and Mode in Evolution (1944)
The meaning of evolution (1949)
The Dechronization of Sam Magruder
Principles of Animal Taxonomy (1961)
Quantitative Zoology (1939)
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