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well if you make the assumption that the human race erod like around the equator and the skin color dark skin color would be the phenotype then are you assuming that uh as people moved outward there was a mutation and if you were in the north it allowed that mutation to live which is how we got white people yes would that follow yeah yeah if if Nina jaboni who spoke at another one of your uh things explained this and uh she played a role in in studying the the reason for dark skin which is if you have lots of intense sunlight it destroys folic acid and it turns out folic acids really important for babies to develop properly so itamp;#39;s not too good for a population for the babies to not develop properly so thatamp;#39;s why dark skin now as you move north thereamp;#39;s another essential vitamin called vitamin D thereamp;#39;s an thereamp;#39;s an intermediate biochemical intermediate that needs to be then converted by the liver but that intermediate is formed by UV light going