You guys really wanna subscribe to the New Scientist.
It's been common knowledge for a few years now that EVERYONE can be traced back to a group of about 60,000 people who slowly spread out of Africa through the middle east. The odd thing though is that among these 60,000 only 7 different women spread their chromosomes about and since then.....all the offspring of 6 of em have died out.
That's right, we're all descended from the same black chick. Guess she had no rhythm though.
The only thing studies haven’t told us is whether or not indigenous people such as Aborigine’s or South American Indians (or North come to that) have the same genetic make up. This is simply because the studies haven’t been done yet. It'll be interesting to find out if these guys have the same genetics or whether they really are "other" people.