New DNA study helps explain unique diversity among Melanesians


"In this part of the world, the genealogy extends back more than 35,000 years, when Neanderthals still occupied Europe," he adds. "These island groups were isolated at the edge of the human species range for an incredible length of time, not quite out in the middle of the Pacific, but beyond Australia and New Guinea. During this time they developed this pattern of DNA diversity that is really quite extraordinary, and includes many genetic variants that are unknown elsewhere, that can be tied to specific islands and even specific populations there. Others suggest very ancient links to Australian Aborigines and New Guinea highlanders."

Friedlaender also says that the study gives a different perspective on the notion of the "apparent distinctions between humans from different continents, often called racial differences. In this part of the Pacific, there are big differences between groups just from one island to the next — one might have to name five or six new races on this basis, if one were so inclined. Human racial distinctions don’t amount to much."