Not sure how viable these sites are as sources, but also i don't know enough about genetics to determine full extent of changes over long stretches of time. All i know is trying to apply a logical sense of possibilities. In my speculation, just though it to makes sense for climates that are more hot and sunny for people to adabt with darker skin. Even if different races have all the same genetics, might not mean the genetics are not used in different ways. Clearly there is something there that instructs people to have different skin colors and other minor changes. It's not a bad thing to ask what causes these physical differences and why they occur. What you thoughts on what causes the variations of physcal differences if not genetics?
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