Why do Africans have large noses and lips?

[Riyn]

Hey SHF, you're so right. The sun is only a catalyst in releasing Vitamin-D that is already in the body from food stuff. If i remember correctly (not attached) The stuff the turns into Vitamin-D just requires a certain amount of radiation to go through synthesis in the body.

Traveling to colder regions requires more warmth and shelter therefore limited amount of sun-time and less intense shore daylight. The body must adapt to keep the processes effective and keep you alive. I'm guessing as well fairer skin reflects light better therefore keep heat in.

[Antreas]

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 interesting issues too. Haven't red much about these issues but there must also be climate (dry, humid...), environment (forest, mountain, desert, hunting, fishing obtions etc) playing certain kind of role.

Diversity among Africans is actually much larger than among Asians, Europeans and Native Americans because those who left Africa were most of the time with relatively small groups and very isolated compared to those who stayed in Africa.

[jelpmac]

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 common factors forged the similar change. Maybe jungle/desert/frozen habits are quite similar and food/water sources, oxygen requirements or enhanced scent tracking forced the mutation.

[Jai2sriram]

I woud say that nostrils of Africans aren't big. They are normal. because they don't need to warm up the 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 plant eating animals. And in the north people were eating a lot of meat durin previos 10.000 years.

[dillonkd]

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. Wow, education 1:1!