Human of light skin

Discussion in 'Human Science' started by timojin, Nov 23, 2016.

  1. Xelasnave.1947 Valued Senior Member

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  3. RuneSpider Registered Senior Member

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    Of course they didn't. But not knowing about it doesn't mean they didn't have to deal with the effects of vitamin d deficiency .
    And according to one of the links I posted earlier light skin began to dominate later than we thought, maybe due to a dependence on foods low in vitamin d leading to adaption.
     
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  5. Xelasnave.1947 Valued Senior Member

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    I appologise, I was being silly and I should have acknowledged your contributions to this thread.
    Alex
     
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  7. RuneSpider Registered Senior Member

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    Ah, no worries.
    Sorry to jump the gun there.
    I registered ages ago apparently, but I have been on since then.
    So I don't know who's kidding or being serious.
     
  8. Xelasnave.1947 Valued Senior Member

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    My attempts at humour fall flat with monotonous regularity such that I really should abandon all future attempts but I really can not help myself.
    However when reading my posts and they present as strange a safe approach would be to conclude that you are witnessing another failed attempt.
    Alex
     
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  9. RuneSpider Registered Senior Member

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    Humor is a difficult thing to tackle on the typed medium.
     
  10. Xelasnave.1947 Valued Senior Member

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    It is difficult to get the timing right.
    Alex
     
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  11. Fraggle Rocker Staff Member

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    This isn't exactly cutting-edge science. Someone explained it to me more than 30 years ago.
     
  12. joepistole Deacon Blues Valued Senior Member

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    Who said it was? It doesn't change anything. It still is the current theory.
     
  13. timojin Valued Senior Member

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    Does this article takes into account The tilt of processional axis ? Meaning that at some point in time the northern part of African continent the skin color was light , because the tropical area was further South.
     
  14. Fraggle Rocker Staff Member

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    The development of Homo sapiens took place over a rather short timeline, half a million years in round numbers. The planet doesn't shift orientation that far, that quickly.
     
  15. timojin Valued Senior Member

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    By your argument with what color skin did Homo sapien come into be ?
     
  16. sculptor Valued Senior Member

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    it seems most likely that light skin is the default, and dark skin is the adaptation
     
  17. RuneSpider Registered Senior Member

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    I don't see how, as the gene for dark skin predates the development of the gene for light skin.
     
  18. timojin Valued Senior Member

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    Was Neanderthal man light or dark ? Neanderthals residue were found in Europa 400K years ago and the slab mated with the modern man from Ethiopia ( descendants of Lucy )
     
  19. exchemist Valued Senior Member

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    This article suggests indeed that Neanderthals were already adapted to the climate in Europe and that when modern man came from Africa it was indeed interbreeding with Neanderthals that gave us the range of skin and hair colour that we have today: http://news.nationalgeographic.com/...s-genetics-migration-africa-eurasian-science/

    Which I did not know, so thanks for the questions.
     
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  20. timojin Valued Senior Member

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    Neanderthal visited your Island .
    http://www.upi.com/Science_News/201...ve-in-England-for-180000-years/5871481726702/

    SAINT HELIER, Jersey, Dec. 14 (UPI) -- Neanderthals may have taken vacations, or at least they liked the view from the granite cliffs of Jersey. New evidence suggests Neanderthals visited La Cotte de St Brelade, a prehistoric site on the island of Jersey, for at least 180,000 years.

    Previous surveys of La Cotte de St Brelade have been limited in scope, focused mostly on concentrations of mammoth remains within the cave. The latest effort involved a wide-angle approach.

    Researchers re-examined stone artifacts unearthed in the 1970s to better understand how they were made and where materials were sourced from. The survey helped archaeologists get a better sense of how visitors to La Cotte de St Brelade utilized local resources and the surrounding landscape. The analysis also revealed where Neanderthals were visiting from.
     
  21. RuneSpider Registered Senior Member

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    In the link I provided earlier, the gene for dark skin evolved before neanderthal.
     
  22. Fraggle Rocker Staff Member

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    The first Homo sapiens arose in Africa, where they needed protection from the sun. The species would not have survived if they had light skin. As our ancestors spread out into regions with other climates, mutations for lighter skin arose. Melanin concentration is controlled by just a handful of genes, so they were able to spread out into the northern latitudes within just a couple of millennia. As I've noted before, the dark-skinned Bengalis are closely related to the light-skinned Latvians, yet they dispersed over hundreds of miles in just a couple of thousand years.
     
    Last edited: Dec 17, 2016
  23. sculptor Valued Senior Member

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    see post 15 above
     

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