<classify> Okuchwepheshe ngokuba nyawo-mbili kutholakala emathanjeni aguquke itshe we-Australopithecus kusukela eminyakeni eyizigidi ezingu-4.2-3.9 edlule, nakuba ama-Sahelanthropus kungenzeka ayehamba ngezinyawo ezimbili ngaphambili kakhulu eminyakeni eyizigidi eziyisikhombisa edlule.  <topic>: TransportHistory 