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 ...

Behavioural adaptability in primates is widely known. However, the role of local landscape metrics on the use of stone tool sites remains poorly understood. Therefore, we tested whether the distance ...

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 ...