humanorigins.si.edu Au. sediba’s Australopithicus sediba Australopithecus sediba East African origins of genus Homo Australopithecus sediba Australopithecus sediba Australopithecus sediba East African origins of genus Homo Au. sediba’s scientific Australopithicus sediba Australopithecus sediba Australopithecus sediba Australopithecus sediba