Ancient rumbles in the jungle might have left a lasting mark on the human hand.
A human hand (right) has shorter fingers, a shorter palm and a longer, stronger thumb than a chimpanzee hand (left). These hand proportions, which allow humans to make a fist, may have evolved in response to fistfighting, a new study suggests.
Log in
Subscribers, enter your e-mail address for full access to the Science News archives and digital editions.
