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News Release 12-037
Evolution of Earliest Horses Driven by Climate Change
The hotter it gets, the smaller the animal?
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An artist's reconstruction of a modern horse compared with Sifrhippus.
Credit: Danielle Byerley, UFL
Earliest horses show that past global warming affected the body size of mammals.
Credit: Jonathan Bloch and Stephen Chester, University of Florida
Teeth of Sifrhippus at its larger size with teeth from the same species after its size shrank.
Credit: Kristen Grace, UFL
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From fossils, researchers determined oxygen levels on Earth some 56 million years ago.
Credit: Kristen Grace, UFL
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Scientist Ross Secord with Coryphodon, an extinct mammal similar to a hippo.
Credit: UNL
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The researchers' work is described in the February 24, 2012 issue of the journal Science.
Credit: Copyright AAAS 2012
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