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Science 27 June 1997:
Vol. 276. no. 5321, p. 1968
DOI: 10.1126/science.276.5321.1968
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Research News

PALEONTOLOGY:
Climate-Evolution Link Weakens

Richard A. Kerr

Researchers have speculated that climate's innumerable warmings and coolings have spurred evolution by pushing unfit species to extinction and opening the way to new, better adapted species. But the best compilation of fossil evidence on mammal evolution to date now shows that climate had little effect on most of the evolutionary churnings of the past 80 million years.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)