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Why are there some light-skinned races of humans and some very dark-skinned?
Wiki User
∙ 13y ago
From what I've learned, if someone is light skinned of the black race, it simply means somewhere in this persons family history there are white people on their family tree. Dark skinned people are less likely to have white ancestors or blood family members down the family tree.
Wiki User
∙ 13y ago
Skin color variation in humans is primarily due to evolutionary adaptations to different levels of ultraviolet (UV) radiation in different geographic regions. Darker skin provides protection against harmful UV radiation in sunny areas near the equator, while lighter skin allows for greater absorption of sunlight to produce vitamin D in regions with less sunlight. Over time, populations living in different environments developed distinct skin tones as an adaptive response to their surroundings.
Wiki User
∙ 12y agoThe adaptions they have made to their environments thousands of Years ago. Sunny areas = skin got darker over time to protect them from harmful uv
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