Bonobos rival chimps at the art of cracking oil palm nuts

Bonobos cracking nuts with rocks

CRACKING UP Bonobos in an African sanctuary use stones to crack oil palm nuts surprisingly well, researchers say. These apes hold nut-cracking stones in 15 different ways, and use 10 hand grips not previously described for tool-using chimps or monkeys.

Both: J. Neufuss

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