article: Olduvai Gorge
links: Homo habilis Tanganyika Homo sapiens Earthquake East Africa Homo ergaster Stratum Louis Leakey Paranthropus boisei Great Rift Valley Hominidae Laetoli Fault (geology) K–Ar dating Oldowan Elephant Mary Leakey Climate change Serengeti Fossil Pleistocene Homo erectus Erosion Acheulean Tanzania