RE: Agnostic Atheism? Your opinions thread's landfill
December 25, 2011 at 7:24 pm
(This post was last modified: December 25, 2011 at 7:25 pm by Oldandeasilyconfused.)
Quote:While my research is minimal,
Is that code for 'non existent'?
Quote: I'm gonna go with clothing being responsible for white skin.
Umm,actually scientific consensus is that skin colour is caused by MELANIN, which in turn is related to climate more than any other factor. If it was due to clothing,it would not be genetic.
Quote:Human skin color is primarily due to the presence of melanin in the skin. Skin color ranges from almost black to white with a pinkish tinge due to blood vessels underneath.[1] Variation in natural skin color is mainly due to genetics, although the evolutionary causes are not completely certain. According to scientific studies, natural human skin color diversity is highest in Sub-Saharan African populations,[2] with skin reflectance values ranging from 19 to 46 (med. 31) compared with European and East Asian populations which have skin reflectance values of 62 to 69 and 50 to 59 respectively.[3] The term "range" is loosely defined in this case, as African albinos have obviously not been taken into consideration when calculating the "range".
The natural skin color can be darkened as a result of tanning due to exposure to sunlight. The leading explanation is that skin color adapts to sunlight intensities which produce vitamin D or ultraviolet light damage to folic acid.[4] Other hypotheses include protection from ambient temperature, infections, skin cancer or frostbite, an alteration in food, and sexual selection.[5]
http://en.wikipedia.org/wiki/Human_skin_color