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From: Ahab
Date: 8/19/2002
Time: 9:04:17 PM
Remote Name: 66.19.13.81
>>But we're not talking psychological impact. we're talking pathology.<<
Hair makes a direct contribution to the survival of an individual.
If it did not, men and women would not be genetically programmed to favor mates with hair.
The most obvious and direct contribution to an individuals survival would be protection against the radiation from the sun that causes skin cancer and overheating of the brain in tropic areas.
People who evolved in the tropics kept their hair as protection from the radiation and heat of the sun, by evolving with hair that is kinky, which creates air spaces to facilitate cooling via air circulation and evaporation of scalp perspiration, while at the same time shielding the head from the suns direct radiation.
In norther climates, the tendency was to still keep ones hair, but the hair of Norther peoples tends to be designed to keep the head warm, yet by containing less pigment, allow more of the sun's rays to penetrate to the scalp to increase vitamin D production in the skin.
So, hair has a direct function that contributes to survival--individuals who lose their hair prematurely have a genetic disease like Huntington's disease.
Male pattern baldness, like Huntington's disease, is a genetic condition that does not kill you outright, but which allows the individual enough time to find a fit mate, produce children, but then, when baldness kicks-in, have his life cut short eventually from being a less capable hunter (overheating) or from succumbing to premature death from skin cancer.
The same is true of Huntington's disease, which does not manifest itself until a person's 40's (approximately), after which it kills the sufferer--but not until he's managed to make some kids to carry the gene into the next generation.
Remember, too, that until the last hundred or so years in the West, it was common for people to begin families while in their early teens, which would allow carriers of genes of very early onset baldness, plenty of time to mate and rasie some kids before succumbing to rejecton by the more desirable, i.e., fitter, mates, and plenty of time to raise the kids made when he or she could secure a mate among the fitter ones.
From: NY
Date: 09 Feb 2011
Time: 17:49:48
Remote Name: 118.97.34.125
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