The Colston Four

Defeated yourself with that one.

Evolutionary pigmentation of the skin is caused by ultraviolet radiation of the sun.

Where the sun is strongest, skin colour has become darker, while weak solar radiation gives light skin colour.

It's all to do with folate depletion and Vitamin D.

Fascinating stuff.
 
very artistic.
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Evolutionary pigmentation of the skin is caused by ultraviolet radiation of the sun.

Where the sun is strongest, skin colour has become darker, while weak solar radiation gives light skin colour.

It's all to do with folate depletion and Vitamin D.

Fascinating stuff.
Does any living adult not know this?
 

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