I actually have a theory about this, and by the way I am no way a racist, but I believe that white people and place people are in the same family but different sub species, I mean look at it like this you see in taxonomy all the time a animal with be of the same genus yet do to locality and subtle difference like size and color the will deem it a new sub species, why cant this be true for humans, black people are only from a certain part of the world there are differences in pigmentation, hair and muscle fibers, that many differences would deem any animal a different species and or sub species.