A new study provides experimental evidence that wild capuchin monkeys use more than just physical cues when selecting stone tools; they also rely on visible signs that a stone has previously been used ...

Stephen has degrees in science (Physics major) and arts (English Literature and the History and Philosophy of Science), as well as a Graduate Diploma in Science Communication. Stephen has degrees in ...

Breaking into a cashew nut can be difficult; but not if you're a monkey. Primates in Brazil are well honed in using stones to break into the nuts and new research suggests they have been doing so for ...

A study of wild capuchin monkeys found that when stones used as tools showed signs of use, they were more likely to be used again. Researchers speculate that this tendency may also apply to humans. A ...

When monkeys in Thailand use stones as hammers and anvils to help them crack open nuts, they often accidentally create sharp flakes of rock that look like the stone cutting tools made by early humans.

Picture two animals doing what looks like the same job. One is a chimpanzee in the forests of Côte d’Ivoire, an animal that often weighs more than 40 kilograms, lifting a stone to smash open a nut.

This capuchin monkey cracks open a cashew nut using the "experimental stones". It achieves this by placing the nut on a soft anvil and striking it with a hard hammerstone. A new study provides ...