I read yesterday that this is untrue and that this years potential nobel prize winners disproved this. Its more like 90 percent. How do you explain physical differences? Irrelevant. This is like saying because we shared the same great great great grandparents it doesn't matter if you mixed with the negroes and other races since then. Why do you think race is a social construct? Tell me what the definition of race is. How is it that you don't think its right?