East of Eden at the Paleocene/Eocene Boundary

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Science  15 Mar 2002:
Vol. 295, Issue 5562, pp. 2028-2029
DOI: 10.1126/science.1070259

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About 55 million years ago, a variety of mammals dispersed across the Northern Hemisphere, radically reshuffling the Earth's biota. But where did these predecessors of modern mammals originate? In his Perspective, Beard highlights the report by Bowen et al., whose new geochronological data strengthen the case for Asia as the birthplace of numerous modern groups of mammals, including primates.