UC Berkeley graduate student Yohannes Haile-Selassie at the Ethiopian dig site. Yohannes Haile-Selassie, a graduate student in the Department of Integrative Biology, has discovered what may be man's oldest known relative. A study of Haile-Selassie's find has led paleoanthropologists to believe man may have walked upright much earlier than originally thought. Copyright 1996 Tim D. White\ Brill Atlanta.