use tools to help them procure food. Researchers writing in the current issue of Science report having spotted capuchins in the Caatinga forests of northeastern Brazil regularly using stones to dig ...

In the early 20th century, scientists maintained that one of the fundamental differences between animals and humans is that ...

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 ...