Chimpanzee caches, and makes, throwing stones

A chimpanzee at the Furuvik Zoo has been observed collecting stones and leaving them in little piles to use later, for throwing at tourists. Ed Yong at Not Exactly Rocket Science has the story: “Chimpanzee collects ammo for ‘premeditated’ tourist-stoning.”

Even more interesting, when zookeepers removed the stones, the chimp, Santino, collected more and then began making them by breaking off chunks of concrete.

We already know that chimps were making stone tools 4,000 years ago.

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