Re: Scientists Find A DNA Change That Accounts For White Skin
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For example, Eastern native Americans had lighter skin than Western Native Americans.
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That really doesn't surprise me. Lattitude isn't the only factor affecting sun exposure. Altitude and climate are important factors. Western North America generally has drier climate (fewer cloudy days) and higher altitude than eastern North America (except for coastal regions). I know I would never have survied in Colorado with my fish-belly white northern European skin without clothing and sunscreen. I would probably have died of infected third degree sunburn. Also, I think temperature may be a factor. In cold climates, people have to wear clothing or furs to keep warm, and aren't exposing much skin to the sun. In warm climates, they can go naked, or nearly so.
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