The Olduvai Gorge in northern Tanzania has a geology that fossil-hunters love. A river cuts through several layers of strata with four distinct beds. Bed I, the oldest, is about 2 million years old.

A newly discovered cache of 27 carved and sharpened bones from elephants and hippos found in Tanzania's Olduvai Gorge site pushes back the date for ancient bone tool use by around 1 million years.

They were found in the Olduvai Gorge in East AfricaCredit: CSIC They were discovered in the Olduvai Gorge in Tanzania. It's a steep-sided ravine in the Great Rift Valley, and contains evidence of ...

Olduvai stone chopping tool (made 1.8 million years ago) found in Olduvai Gorge, Tanzania, East Africa. Perhaps the best thing of all about being Director of the British Museum, and one that still ...