Evolution of Human Hair - AMNH SciCafe 

She does! Check out "Why Am I Like This?" on our RU-vid BFF channel, @PBSTerra: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-y7S8tAK-74k.html

I feel sexual selection must play a role in this as well. Consider how quickly the genes for blonde hair became common, and not so very long ago either.

@@ericvulgate i think color has more to do with uv absorption, its why you see more red heads where you dont get as much sun, but i think ridiculous length is like a bird of paradise thing like why can some people grow their 3 times the length of their bodies all it does is get in the way, it makes hygiene more difficult especially before running water i'm like the opposite of an expert but i would really like an expert to explain it to me

You should make a second part

@@fullup91 - I'm totally useless doing videos, presentations and such, sorry. Also I would have other priorities.

Where did the original populations of homo sapiens evolve? Africa?

@@chesterdamolester6990 - Yes, Africa. All the evidence points to the Upper Nile region. Mitochondrial DNA clearly points to that area (Sudans, Ethiopia, Uganda, etc.) and the oldest true H. sapiens we have are from Southern Ethiiopia (Omo 1). Y-DNA, once we remove the very rare A0 and A00, which are from Central-West Africa but almost certainly represent introgression by closely related "archaics", is also from the Upper Nile region (A1 and descendants, which are almost all modern human patrilineages). If you ever read or hear that there is older H. sapiens from Morocco, that's incorrect: they are a closely related "archaic" branch, as there are others in Tanzania or even Ethiopia itself (Omo 2 for example). The material (tools) evidence (MSA or African Middle Paleolithic, quite diverse and creative) is also mostly from the Upper Nile as well for the dates of coalsecence of our species (c. 200,000 years ago), although some techno-culture from the Congo basin could also be part of our ancestral presence (but DNA only points to NE Congo at best and there are no skeletal remains, which may be because of jungle environment is horrible for preservation of human remains anyhow). I estimate that soon after coalescence, maybe c. 170 Ka ago, a branch (mtDNA L0, ancestral to Khoisan people primarily) diverged in East Africa (Tanzania approx.) and would later migrate to Southern Africa. Second to diverge were the ancestors of modern Pygmies, (mtDNA L1), which surely migrated to Central Africa (Gabon, Cameroon, etc., where they slightly admixed with some closely related "archaics", of which we know nothing other than their DNA legacy). Thirdly a major wave surely spread to the Chad area (mtDNA L2, partly precursor of mainline Africans of the Niger-Congo linguistic family), however these retained connection with the Nile region core group because they both ended up with pretty much the same Y-DNA (E and A1(xB,CDEF)). Finally the Nile core population was finally the source of the "out-of-Africa" migration (c. 125 Ka ago to Arabia-Palestine and North Africa), which carried a few derived lineages: mtDNA M and N, both derived from L3, which has other five sub-haplogroups exclusive of Africa, Y-DNA CF and part of D. These surely reached India c. 90-100 Ka BP (still with African technologies of the Aterian and Nubian types) and soon afterwards SE Asia as well, remaining in those areas until maybe c. 70-60 Ka BP, when they expanded further (mostly from SE Asia although some Indian genetics were also co-opted on the way to West Eurasia, where the "great Neanderthal war" took place (for tens of thousands of years, it's a way of speaking).

Are you suggesting that all humans are African apes?

What about Indians who have very straight hair? India is hot 🔥 🥵

​@@fullup91 Good point! It might be about their genetic ancestry. I don't know though.

Indians already likely had straight hair . There is no proof of people having straight hair but went curly like in Africa.

PS baboons and some other monkey groups spend a lot of time in the Savanna with a lot of sun exposure and have straight hair, but again their brains are smaller and perhaps the nasal regions of baboon's expanded muzzle help cool the brain as they do in some non-primate ungulates via heat exchange.