chocoloco on 08 January 2012
The Melanin in darker people skin is an evolutionary trade off for being less able to produce vitamin D. Lighter skin is more efficient at producing vitamin D because these people came from climates with less light and needed less melanin and a more efficient cells that produce vitamin D. Were it is the opposite for darker skinned people coming from climates with more light. All these things have an evolutionary bases, but I wont go into it further.
