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Science 18 March 2005:
Vol. 307. no. 5716, pp. 1728 - 1730
DOI: 10.1126/science.1105458
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Perspectives

EVOLUTION:
Fossil Horses--Evidence for Evolution

Bruce J. MacFadden

The modern day horse Equus is a beloved icon but also, thanks to its many fossil relatives, has proved valuable for understanding macroevolution (that is, the long-term evolution of species). In his Perspective, MacFadden discusses fossil evidence supporting a branching family tree for the Family Equidae and points out why horse fossils have been beneficial for understanding evolution.

The author is in the Florida Museum of Natural History, University of Florida, Gainesville, FL 32611, USA. E-mail: bmacfadd{at}flmnh.ufl.edu

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