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Life & Evolution

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howler monkey

MONKEY BUSINESS  Being able to tell red and green apart helps howler monkeys like this one pick out younger, more nutritious leaves, research suggests.  

Angie

APE ME  Low-ranking chimpanzees in a captive colony, represented here by a female named Angie, were more successful at spreading a trained, rewarding behavior to other group members than alpha males were, a new study shows. The finding points to the complexity of chimps’ social lives.

Birgus latro

SOUTHPAW STRENGTH  Birgus latro, the largest known crab species on land, scavenges with a mighty left claw strong enough to crack a coconut.

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