Some monkeys accidentally make stone flakes that resemble ancient hominid tools

The find suggests some Stone Age cutting tools were products of chance, not planning

Three long-tailed macaque monkeys appear to be pounding open oil plam nut with rocks.

In Thailand, long-tailed macaque monkeys (shown pounding open oil palm nuts with rocks) inadvertently bash off pieces of stone, raising questions about whether some of the earliest known hominid tools were made on purpose.

Lydia V. Luncz

Monkeys in southern Thailand use rocks to pound open oil palm nuts, inadvertently shattering stone pieces off their makeshift nutcrackers.