Oldupai Gorge or Olduvai Gorge is one of the most important historical sites in the world and has been instrumental in furthering the understanding of early human evolution.
This site was occupied by Homo habilis approximately 1.9 million years ago, Paranthropus boisei 1.8 million years ago, and Homo erectus 1.2 million years ago. Homo sapiens is dated to have occupied the site 17,000 years ago. Oldupai Gorge is a steep-sided ravine in the eastern side of Serengeti plains in and is about 48 km (30 mi) long.
This site is significant in showing increased developmental and social complexities in hominins.
The name Olduvai is a misspelling of Oldupai Gorge, which was adopted as the official name in 2005. Oldupai is the Maasai word for the wild sisal plant Sansevieria ehrenbergii, which grows in the gorge.