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.

Archaeologists have long believed that humans didn’t start crafting tools from bone until between 250,000 and 500,000 years ago. However, a 2018 excavation in Tanzania’s Olduvai Gorge turned ...

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 ...