"i have had a problem with this for a while ow.let me ask u something Prince, there are some balck people in china who have been there for a long while, they have chinky eyes like the chinese BUT they STILL have there dark to dark brown complexion(they dont have blue eyes or anything) and what have u.HOW COME THE PEOPLE THAT SO CALLED CAME OUT OF AFRICA TURN WHITE, HOW?"

I don't know about the "black Chinese" people you mentioned, or how long they have been in China. The processes of physical change I am talking about can take well over 20,000 years. Species and "races" are not static. They can change over time. Random genetic mutations occur, some of which are advantageous, some disadvantageous. If a disadvantageous mutation occurs, it won't last long in the genetic chain because those who inherit it are more likely to die before reproducing, and therefore it won't get passed on to many generations. If, on the other hand, a genetic mutation occurs which provides even a slight survival advantage in a particular environment, it will eventually become widespread. Not only can this result in one "race" changing into another, it can even result eventually in one species changing into another.