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One would think logically if humanity began in Africa it did so with dark skin. But I am reading a study that suggests otherwise. According to these researchers, light skin is the beginning of our complexion. What do you guys think. Link below.
quote:“If you shave a chimpanzee, its skin is light,” says evolutionary geneticist Sarah Tishkoff of the University of Pennsylvania, the lead author of the new study. “If you have body hair, you don’t need dark skin to protect you from ultraviolet [UV] radiation.”
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For one, bonobos are small and slender when compared to the taller, stockier chimps. Also bonobos have pink lips and black faces, while chimps have brown lips and faces that change color as they age.
This is a discription of the difference between bonobos and chimps.my problem is if amh lived below the sahara before moving north and eventually out of Africa then why would they be "light" like chimps if that region is at a Max of a 10 in the UV index all year round unless it wasn't as bad 300,000 years ago?
quote:Originally posted by Black Crystal: One would think logically if humanity began in Africa it did so with dark skin. But I am reading a study that suggests otherwise. According to these researchers, light skin is the beginning of our complexion. What do you guys think. Link below.
But I said it years ago, SLC24A5 is in Africans fixed and unfixed.
Posts: 22235 | From: האם אינכם כילדי הכרית אלי בני ישראל | Registered: Nov 2010
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quote:Originally posted by Thereal: For one, bonobos are small and slender when compared to the taller, stockier chimps. Also bonobos have pink lips and black faces, while chimps have brown lips and faces that change color as they age.
hairless baboon, dark in the face, hands and feet where they wouldn't normally have hair
I don't have a picture of a hairless bonobo
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Tukuler
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SNOW MONKEYS The most northerly Old World monkeys live in Honshu, Japan, where there is deep snow in the winter. In some areas, Japanese macaques have learned to keep warm by sitting in hot springs, where they often groom each other,
quote:Originally posted by Thereal: What does that have to do with my post as that isn't a bonobo or chimp?
A big imgage of a chimp with alopecia.
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you brought up bonobos that are already not the typical chimp. You described their faces. So I showed that you can't go by a primate's face because, their exposed body parts are sometimes much darker than what is under their hair. The baboon had a black face and pale white body. So that informs you the skin under the fur of some baboons being white is normal. Th abnormality is the missing fur. If they were albinos that would not have those dark faces
Now, looking at the hairless chimps some are grey others are this kind of lighter slightly orange-ish color. Either their skin color varies or the grayer ones have some sun tanning.
Obviously with these tropical animals their skin doesn't need to be that dark in the parts of them that are covered in fur because the fur is a barrier against sunlight radiation damage to the skin
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Bonobos and chimps are different species and my post was pointing out the differences also bonobos are second after chimps in terms of how close they are to humans who by comparison are younger than chimps or bonobos,if fur gave rise to pigmented skin when are species came about than why are chimps pigmented when their habitat is forest where sun light is blocked by trees and their fur is another layer of shielding?
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quote:“If you shave a chimpanzee, its skin is light,” says evolutionary geneticist Sarah Tishkoff of the University of Pennsylvania, the lead author of the new study. “If you have body hair, you don’t need dark skin to protect you from ultraviolet [UV] radiation.”
So the next step is cruel and brutal. Study them in where melanoma begins and document each step.
As I said says ago. This also explains why West Eurasians are hairy they way they are.
Posts: 22235 | From: האם אינכם כילדי הכרית אלי בני ישראל | Registered: Nov 2010
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posted
This is an old ass study which has been addressed constantly. They're talking about OLDER humans(not homo sapiens) who wouldn't even resemble us in the slightest bit.
Posts: 1891 | From: NY | Registered: Sep 2014
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quote:Originally posted by Black Crystal: One would think logically if humanity began in Africa it did so with dark skin. But I am reading a study that suggests otherwise. According to these researchers, light skin is the beginning of our complexion. What do you guys think. Link below.
Science. 2017 Nov 17; 358(6365): eaan8433. Published online 2017 Oct 12. doi: 10.1126/science.aan8433 PMCID: PMC5759959 NIHMSID: NIHMS929213 PMID: 29025994
Loci associated with skin pigmentation identified in African populations Sarah Tishkoff et al.
the ancestral allele is associated with light pigmentation in approximately half of the predicted causal SNPs; Neanderthal and Denisovan genome sequences, which diverged from modern human sequences 804 kya (62), contain the ancestral allele at all loci. These observations are consistent with the hypothesis that darker pigmentation is a derived trait that originated in the genus Homo within the past ~2 million years after human ancestors lost most of their protective body hair, though these ancestral hominins may have been moderately, rather than darkly, pigmented (63, 64). Moreover, it appears that both light and dark pigmentation has continued to evolve over hominid history.
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