Earliest evidence of monkeys’ use of stone tools found

Capuchins in Brazil used flat ‘anvils’ and round ‘hammers’ to smash nuts at least 600 years ago

bearded capuchin monkey cracks nut

NUTCRACKER  A juvenile male bearded capuchin monkey uses a rock like a hammer to open a green cashew nut. Capuchins have used stone tools like these for at least 600 years.

Tiago Falótico

Using tools is very old monkey business.