Capuchin monkeys’ stone-tool use has evolved over 3,000 years

A Brazilian site shows the animals’ long history of selecting various types of pounding devices

capuchin monkey

GRIPPING PAST  A Brazilian excavation indicates that capuchin monkeys have used stones as pounding tools for 3,000 years, with variations along the way in tool size and weight.

Tiago Falótico/Flickr (CC BY-NC-SA 2.0)

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