Wednesday, March 7, 2012

Horses Shrank as Planet Warmed

New research shows that an ancestor to the modern horse (Sifrhippus sandrae) living 56 million years ago shrank in size with the warming of Earth's climate over the 175,000-year Paleocene-Eocene thermal maximum, the first data to confirm Bergmann's rule applies to changes over time as well as location.

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