The jawbone was found in Ethiopia 's Afar region , not far from where `` Lucy '' was discovered . It has been dated to 2012 , which means it helps fill in a crucial gap in our knowledge .
The jawbone was found in Ethiopia 's Afar region , not far from where `` Lucy '' was discovered . It has been dated to 2.8 million years ago , which means it helps fill in a crucial gap in our knowledge .