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By using stones to break open nuts, monkeys accidentally create sharp-edged flakes that look like the tools believed to have been used by our ancient human relatives. The finding casts doubt on ...

The tools were dated to 700,000 years, and include waste flakes chipped away by humans, the researchers report in Thursday's issue of the journal Nature. At the time, Britain was connected to ...

Monkeys using stones to crack open nuts generate many stone flakes accidentally that look exactly like the ones archaeologists have long thought early humans made intentionally as tools.

A long-tailed macaque uses a stone to get at food. The striking of one stone on another accidentally creates stone flakes the monkeys don't use. Lydia V. Luncz When monkeys use two rocks to smash ...

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 ...