Prehistory From the Great Rift Valley, between three and four million years old are derived from Australopithecus afarensis (see Laetoli). In Olduvai, approximately 1.8 million-year-old finds of Australopithecus robustus and Homo habilis have been made together with simple stone tools of the early Oldowan type, as well as of later Oldowan and acheulé types. Other […]
