Stone Tools Helped Shape Human Hands
21st April 2013
Before the hand axes appeared, our ancestors had primitive wrists: good for hanging from branches, but too weak to grasp and handle small objects with much force. And no hand bones had been found to fill the gap between 1.7 million years ago and 800,000 years ago – by which time humans had developed the hands we have today. Now, a new fossil is helping bridge that gap.