Orangutans can learn how to use stone tools as hammers and knives

Captive orangutans that had never seen stone tools could work out how to use them to hit or cut things – but they couldn’t get the hang of making them

Orangutans can learn how to use stone tools as hammers and knives
Captive orangutans that had never seen stone tools could work out how to use them to hit or cut things – but they couldn’t get the hang of making them