(Reuters) - An assemblage of tools found in Tanzania that was fashioned about 1.5 million years ago from the limb bones of ...

and has advanced our understanding of early human life since its discovery over a century ago. The bones included those from ancient elephants and hippos. Credit: CSIC César Hernández Regal In ...

Hippos were common in the area but elephants were not, meaning their bones were probably carried to Olduvai Gorge from elsewhere, according to the researchers. No ancient human fossils were found ...