>> there appears to be a lot of uncertainty in the scientific community regarding the precise chronology and source populations of migrations. Studied quite a

>> there appears to be a lot of uncertainty in the scientific community regarding the precise chronology and source populations of migrations. Studied quite a bit of Antropology/Physical Anthropology in college and nearly every ancient migration is fought with a mix of facts and conjecture, theories and speculation. The most baffling I ran into was that of the South Pacific islands. The archaeological evidence doesn't support a neat and tidy expansion, but quite the opposite. You have evidence that cultures were popping up and then dying out without any distinct patterns to them at all. When you consider the distances between the islands and the isolation of the various archipelagos, it really makes your brain bend. My professor Jeffery Clark has done some fascinating work in the field: Archaeology in Oceania - http://www.academia.edu/1548763/Archaeology_in_Oceania http://www.academia.edu/1548763/Archaeology_in_Oceania