This seems somewhat inaccurate or else I'm misunderstanding something because Europeans tend to be the palest (specifically from Ireland, Scotland, England, and Scandinavia), and I've never seen Inuit or native who were anywhere near as pale as they are... yet this graph implies they're not only as pale, but actually paler apparently
If you're talking about skin darkening as a temporary reaction to sunlight, tanning beds, or sprays: no, I've never heard of anyone being born with a tan.
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If you're talking about permanent darkening of the skin as a means of protection against UV exposure that's developed over thousands of years of evolution... see previous comment
Potentially. It just says "by natural skin color," so I was assuming it was going by... natural skin color to that area. If it's just going by current skin colours after colonization, Africa should probably have more white, north America more black, England more Indian, etc. It's not really important, just my brain being technical I guess, but the graph seems inaccurate to me either way
I don't know why you're downvoting me, I have read anthropological studies that have shown clearly that more than simple geographical adaptation is going on. There are lighter people closer to the equator and darker farther away. There is an aspect of sexual preference involved.
While I didn't downvote you, I think it's possible it came off as sounding like you were implying that sexual preference as in: gay, straight, bi, etc plays a role in skin color, rather than:
People who preferred a specific skin color in certain regions had offspring better adapted to survive in those regions than ones who did not, which is the very basis of evolution
Ah, I see. I am using the term sexual preference as it relates to sexual selection - i.e. the preference of certain characteristics within the opposite sex which ultimately drives natural selection. My point was that the skin color gradient is not purely driven by adaptation to UV radiation - although that is most definitely a driving factor (many papers on this topic). Skin color also seems to be strongly influenced by sexual selection within populations. It is an interesting topic to me as an archaeology student :-)
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If you're talking about permanent darkening of the skin as a means of protection against UV exposure that's developed over thousands of years of evolution... see previous comment
People who preferred a specific skin color in certain regions had offspring better adapted to survive in those regions than ones who did not, which is the very basis of evolution
Genetic and Environmental Factors in Skin Color Determination https://www.researchgate.net/publication/320234941_Genetic_and_Environmental_Factors_in_Skin_Color_Determination
Sexual selection and human geographic variation https://www.researchgate.net/publication/228353785_Sexual_selection_and_human_geographic_variation
https://www.sciencedirect.com/science/article/pii/S0022202X15356025