The excavation of bone tools at Olduvai Gorge in Tanzania expands the range of ancient hominids’ cultural innovations.

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 ...

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 ...