How did different races come about?
How did humans turn into different races of people? 
Has it been determined that some human races have evolved differently than others in specific respects? Are there notable biological differences between people of different races? Were all races (or ethnicity) really created equal? Isn't possible that as a generality some races have strengths and weaknesses that others do not? Can we say different races among humans are different species or subspecies of human? Why is there a facial difference in people with different races? Is it racist to believe that some races have different strengths & preferences than others? Meaning we didn't evolve exactly the same way? Evolution: Why do people from different races(or region) have different facial features? How might the human race develop differently if we knew that there were alien civilisations actively shunning us in our galaxy? Why do humans want to be different from other humans? Could people be naturally more attracted to their own race or attracted to those they're most surrounded by? Are there genetic differences between races? What are the differences between races? What might cause someone to be attracted more to people outside their own ethnicity and race? What would the average person look like if all races merged into one? Are there any actual differences between races? How did racism start? What made people think that a particular color is superior to the other? What causes the difference in the facial features of people of different races? Why do white people have variation in hair and eye color while most other races do not? What's it like to be predominantly attracted to a particular race or ethnic group that's not your own? Why did creatures evolve into two genders and not more to achieve more genetic diversity? Why do people confuse ethnicity with race? Why different cultures have so many differences but the name structures of people are so similar? Is it racist to be attracted more, or less, to people of certain races? How would the world be different if humans evolved from birds rather than monkeys? After generations of interracial mixing, in future will there be only one human race, with no regional differences of characteristics and appearance? Why does a mixed race (black and white) person have brown skin rather than having just black or white skin? Are most people in the world mixed with other ethnics? What were the first humans like? How do they differ from modern humans? Since there is only one Homo sapiens, shouldn't the generally understood term "racist" be changed to "ethnicist"? Out of all the thousands of alien races out there, why was I born a human?