By this I mean that some of the classic cases of Darwinian change in the fossil record, such as the evolution of the horse in North America, have had to be discarded or modified as a result of more detailed information–what appeared to be a nice simple progression when relatively few data were available now appears to be much more complex and much less gradualistic.

David M. Raup, (Curator of Geology, Field Museum of Natural History, Chicago), Conflicts between Darwin and paleontology, Field Museum of Natural History Bulletin, Vol. 50 (1) Jan. 1979, p 25.

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