olduvai gorge

noun

1. a gorge in Tanzania in which is located a site containing Australopithecine and human skeletal and cultural remains.

noun

1. a gorge in N Tanzania, north of the Ngorongoro Crater: fossil evidence of early man and other closely related species, together with artefacts

A deep ravine in Tanzania famous for the fossils of ancestors of humans found there by Louis and Mary Leakey.