Lips

... ie 4 and above, is pigmentation purely based on time exposure to sunlight if the UV level is 10+. And would this be the same for pigment in the lips/mucous skin tissue? Many Thanks

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The title of this topic is just down right, sad. Amazing the title could not have read "why do some ethnicities have larger noses and lips, then others?" News Flash, every ethnicity has a share of large noses and lips it simply depends on the genes that run within that family line. ...

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... air they breathe. And the size of the nostrils in colder places (in the north) got smaller to ensure air wormup before delivering to the lungs. Lips may have something related to nostrils. But also its possible that lips are usefull for eating. coz in animlas well developed lips are common in ...

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rswils:Not about beauty? Attractive mates exist in all cultures. Question was, what survival use necessitated large, broad noses, thick lips for only some tribes of Africa, Melasia, Alaskan Eskimos, Siberian Mongol, some Australian aborigines? All scattered across one half of the world. What ...

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I think the skin color difference is largely solved issue (UV, D-vitamin, melanin etc). There are respectable new studies including those of Nina Jablonski. There is rather good correlation between UV (UVA,UVB and UVC) high radiation and dark skin color. However hair and facial differences are inter...

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