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Science 28 March 2008:
Vol. 319. no. 5871, p. 1746
DOI: 10.1126/science.319.5871.1746a
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News of the Week

BEHAVIORAL ECOLOGY:
Smart Birds Lend a Beak for Food

Constance Holden

Scientists report this week that rooks, like chimpanzees, can cooperate in food-getting tasks. The insight may help explain how cooperation evolved so spectacularly in humans.

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