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COVER A laborer uses a sieve to separate wheat husks from the grain at a market in Amritsar, India. Two Reviews on pages 1862 and 1866 and a News story on page 1830 discuss human domestication of plants. Photo: Narinder Nanu/AFP/Getty Images

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