The fossil skulls of two adults and a child who lived and died 160,000 years ago in the Afar region of Ethiopia are the oldest representatives of Homo sapiens, scientists will report. The finds support the theory that modern humans emerged in Africa less than 200,000 years ago - and for a while coexisted with perhaps two other human species. An American-Ethiopian team reports in Nature that the fossils, unearthed near what was once a lake on the Awash river, provide the first convincing link between prehuman species dating from 300,000 years ago and the previous earliest modern human remains of 100,000 years ago.