Olduvai stone chopping tool (made 1.8 million years ago) found in Olduvai Gorge, Tanzania, East Africa. Perhaps the best ... he reached a layer where the rocks were also shaped by something ...

The Olduvai Gorge in northern ... found in South Africa by Raymond Dart in 1924 and by Robert Broom in 1936. (Those finds had not been accurately dated because of the way they were found and ...

Olduvai Gorge ... discounted Africa as the birthplace of humankind and suggested Asia as a more likely candidate, after bones from what we now know as the hominin Homo erectus were discovered ...