Wheredidwecomefrom?Whatmakesushuman?Anexplosionofrecentdiscoveriesshedslightonthesequestions, andNOVA'scomprehensive, three-partspecial, "BecomingHuman, "examineswhatthelatestscientificresearchrevealsaboutourhominidrelatives.Part1, "FirstSteps, "examinesthefactorsthatcausedustosplitfromtheothergreat...