So Why Do We Have Chins? Experts Have the Answer

The next time you're at a museum peering at early primate and Neanderthal skulls - even those from wild apes today - look closely for the one thing human skulls exclusively have. No, it's not a larger brain-case or a handsome jaw line... it's a chin. Now researchers think they know why it is that modern humans developed this unique, protruding characteristic when no other primates did.