The other model posits far more ancient and diverse roots for our kind. Proponents of this view believe that homo sapiens arose in Africa some 2 million years ago and evolved as a single species spread across the Old World, with populations in different regions linked through genetic and cultural exchange.Of these two models, 'Out of Africa,' which was originally developed based on fossil evidence, and supported by much genetic research, has been favoured the majority of evolution scholars. The vast majority of these genetic studies have focused on DNA from living populations, and although some small progress been made in recovering DNA from Neanderthal that appears to support multi-regionalism, the chance of recovering nuclear DNA from early human fossil quite slim at present. Fossils thus remain very much a part of the human origins debate.Another means of gathering theoretical evidence is through bones. Examinat of early modem human skulls from Central Europe and Australia dated to between 20,000 and 30,000 years old have suggested that both groups apparently exhibit traits seen in their Middle Eastern and African predecessors. But the early mo specimens from Central Europe also display Neanderthal traits, and the early mo Australians showed affinities to archaic Homo from Indonesia. Meanwhile, debate among paleoanthropologists continues, as supporters of the two hypotheses challenge the evidence and conclusions of each other.
đang được dịch, vui lòng đợi..
