Science has determined that modern man, all people living on earth today are one, and that there really is no such thing as race. Skin color and other differences are the consequence of such things as ultraviolet light , latitude, and climate, and ultimately modern humans all came from Africa.
Interestingly, archeologist continue to make discoveries, and have found a number of human variants that date back to the ice age, and perhaps further. Some with skeletons measuring ten feet tall like ones discovered in South America. Among other interesting discoveries are some of the oldest shelters, or dwelling constructed from mammoth bones dating back to the ice age. It is unknown why human variants such as the Neanderthals became extinct, but the search continues.