NEW YORK -- Call them knockoffs. Rock-smashing monkeys in Brazil make stone flakes that look a lot like tools made by our ancient ancestors. Scientists watched as Capuchin monkeys in a national park ...

Critically endangered golden-bellied capuchins (Sapajus xanthosternos) are more widespread than researchers previously thought, and stone tools might be the secret to their success. Although ...

A capuchin monkey in Costa Rica. Scientists studying the stone-smashing habits of bearded capuchin monkeys in Brazil have found that the primates inadvertently produce stone flakes that look very ...

On a remote Panamanian island, researchers have observed for the very first time young male capuchin monkeys stealing howler monkey babies, according to a new study. Since 2017, researchers have used ...