Human beings used to be defined as "the tool-maker" species. But the uniqueness of this description was challenged in the 1960s when Dr. Jane Goodall discovered that chimpanzees will pick and modify ...

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 ...

Monkeys in southern Thailand use rocks to pound open oil palm nuts, inadvertently shattering stone pieces off their makeshift nutcrackers. These flakes resemble some sharp-edged stone tools presumed ...

Macaques in Thailand produced stone flakes while cracking nuts—a finding that could change what we thought about human history. Reading time 3 minutes Researchers studying macaques in one of ...

Groups of chimpanzees in West Africa use stone tools in distinctly different ways to crack open nuts. Researchers used 3D scans to trace wear patterns on the tools, called “hammerstones” and “anvils.” ...