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in some ways we are all are from Jacob and Esau ... Jacob is Caucasian, and Esau is Negroid, and both will produce Mongoloid ... or ambidextrial offspring

Jacob is right handed as Esau is left handed

essau is more like the black race, Native Indian, Latino

and Jacob is more like the Asian, European, lighter skinned people

one can separate those born in the snow with those born in non snow as a jacob to essau people ....

i accept the sun better then my siblings, that makes me more essau then they

research shows that the people who accept the strong sun at the equator over time will live there, as opposited to those that cant take the sun as a result of low skin melanization .....

over 1000s of yrs, the people with a high iron diet also loved the warmer climate ..

high iron diet in any people group produces darker skin tone

over time, those women on a non meat diet will want to live in snow country ....

now this is melting down to people of color and non people of color

or those that hunt for meat compared to those that gather produce, nuts, roots, shoots ...


in any family of 4 children, 2 will be more meat eaters, essau, darker skinned, have more melanization in their bodies

interesting huh .... see the link below


http://phaeomelanin.quickseek.com/

the info below suggests that darker skinned people groups get sick in colder climates as they have too much melanization in their skin and cant absorb the less powerful sun's UV rays needed to make chemicals as vitamin D3 for calcium absorption and good bone, skeletal growth ....

the same for light skinned, especially reddish, or blondish hair, light blue eyed people, they cant live in the equator as they will get too much of the sun's UV rays which are always more intense at the equator

As populations spread from Africa, it seems likely that dark skin color was less well suited to environments with lower UV radiation levels in the temperate zone. While dangerous in excess, UV radiation is essential for the synthesis of previtamin D3, which is needed for calcium absorption and normal skeletal development. In tropical areas, there is no problem receiving enough UV light for D3 synthesis. In higher latitudes, though, where exposure to UV light is significantly less, a high concentration of melanin may hinder the passage of enough radiation to synthesize the necessary amount of the vitamin precursor. Medical records show that people with darker skin living in the higher latitudes are at greater risk for vitamin D3 deficiency (which can trigger the onset of various bone density diseases that can result in immobilization, deformities, and death). For this reason, it is believed that as populations moved north, natural selection favored lighter shades of skin. The point is that by understanding the biological benefits of traits, it is possible to understand the evolution of them.

http://www.mnh.si.edu/anthro/humanorigins/faq/race.htm