[4rcane]

Were we all black when we came out of Africa then turned white, yellow etc when we moved out of there. So in just 100k years. Africans, Europeans and Asians looks so different?

[TigerLikesRooster]

Right. Certain small change could lead to big difference, especially in appearance. Catastrophic natural event can also have big impact on this. Suddenly human population shrink to a small fraction of what it once was, and force them into smaller isolated groups with no interaction for hundreds of generations.
In this kind of situation, changes shows up in much faster pace.

[Cronos]

the simple answer is yes. Take Roma for example — they came from n-w India and the Roma/Gypsies that are still in India are very dark skinned, but those in Europe are much lighter skinned. Why?

[allmendream]

Evolution acting upon human genes for skin color, hair type, nose type, body type, lactose tolerance, malaria resistance, etc, etc.

And as another poster pointed out, the Chinese want to be first at everything. Australopithocine did exist in Africa for millions of years, and some may well have moved to China, but that doesn't necessitate that the Chinese australopithocine is the ancestor of modern man.

[mad_as_he$$]

http://channel.nationalgeographic.com/channel/human-family-tree