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Science 19 November 2004:
Vol. 306. no. 5700, p. 1283
DOI: 10.1126/science.306.5700.1283
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News Focus

HUMAN EVOLUTION:
Faster Than a Hyena? Running May Make Humans Special

Carl Zimmer

Scientists propose that hominids evolved into long-distance runners 2 million years ago to become better scavengers on the African savanna.

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