Don Johanson Don Johanson
Don Johanson Don Johanson
Don Johanson Don Johanson
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Richard Leakey’s Phylogeny in Origins (1977)H. sapiens1 million years2 million years3 million yearsA. robustusLucy?A. africanusH. erectus14704 million yearsHomo sp.“First Family”Laetoli Footprints5 million years?