Lice and human origin
I read an interesting article today about how lice can be connected to the time period when people lost their body hair and started wearing clothing.
Here is 2 paragraphs from the article. And the link. I found it to be very informative and interesting.
Three kinds of louse call Homo sapiens their home, but each occupies a different niche on the human body. The head louse, Pediculus humanus, lives in the forest of fine hairs on the scalp. Its cousin, the body louse, lives not on the skin but in clothes. And the exclusive territory of the pubic louse, Phthirus pubis, is the coarser hairs of the crotch.
Lice are intimately adapted to their hosts and cannot long survive away from the body’s blood and warmth. If their host evolves into two species, the lice will do likewise. So biologists have long been puzzled over the fact that the human head louse is a sister species to the chimpanzee louse, but the pubic louse is closely related to the gorilla louse….
See the full article here:
http://www.nytimes.com/2007/03/08/science/08louse.html?_r=1
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June 27th, 2010 at 8:47 am
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