by 
killa c
ANSWERS: 3
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Already answered this once.
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Evolution. Humans evolve to best suit their environment. Current theory is that white folks diverged from the original gene pool way back in the old days and migrated to where melanin (skin color) is not as important. They did not need the protection of melanin as much. Black people stayed in areas where protection from the sun is more important. There are many variants in between. Every trait has some evolutionary purpose. I do not know the full purpose of melanin in the skin but it might be for more than just protection from the sun. It could just be that white folks did not need it and it slowly evolved out. ------------- The part of the melanocyte cell that forms melanin or pigment is called the melanosome. As pigment granules form, they are transferred from the melanocytes to the keratinocytes and then are carried to the surface of the epidermis. A major purpose of melanin is to absorb ultraviolet radiation and provide protection to newly dividing cells in the deeper layers. http://rosacea.derm.net.au/rosacea-functioning/melanocytes.html
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The same way there is brown & redskin people! as we are the world.
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