Discovery Supports Theory Of A Single Species Of Human Ancestor New Haven, Conn. - The discovery of a million-year-old skull in Ethiopia indicates that a single species of human ancestor, Homo erectus, ranged from Europe to Africa to Asia in the Pleistocene era, according to the cover article in the March 21 issue of the journal Nature. The finding by the research team, which included Elidabeth Vrba, a Yale professor of paleontology in the Department of Geology and Geophysics, contradicts recent suggestions that there was a fundamental, early split in the homolineage between Eurasiatic and African populations. "This find puts...