I totally agree, thats something my science teacher brought up the other day. People adapt to their environments. Evolution is why they're different colour people. Just as you said, People will evolve over many years to fit the condition of their surroundings. Excellent point : Care to provide actual proof of that? Why aren't the people in India black? New Delhi is arguably the hottest place on the planet. I know a white man from Africa. He is tan, not black. But you don't see him in the sun much do you? He skin will burn 24/7 if he did, he pigment is not adapted for that place. It will over time, which is why thats an excellent point by Issy. I'm not sure it's a fact, i could say it is but i don't have the proof. But i sure agree with the fact that it would work.