Capuchin monkeys use a detached flake as an active hammerstone possibly in order to produce quartz dust.
A stone tool found in the sand has always been considered the handiwork of early humans and their ancestors. But a remarkable discovery in a Brazilian forest suggests that might not be so.
17:04 Rock-smashing monkeys make flakes like early stone tools
17:04 Monkeys Can Make Stone Tools, but They Don’t Use Them
22:59 A 'Happy & Relaxed' Looking Angelina Jolie Steps Out For The First Time Following Her Brad Pitt Divorce Drama
16:37 A look at the women making allegations against Trump