Five years ago, my best published
figure for modern man was around 70,000 years.
Now this has creeped back to 200,000 years. In the end in some locale somewhere during
the long million years of ice age, mankind arose. Some like the coast of South Africa ,
while I like the Sunda Archipelago. Most
certainly it puts a range of human sub types out there including Cro-Magnon and
Neanderthal and a likely slew of those not recognized as yet including Bushmen
and other sorts.
The modern era has seen
accelerating hybridization dissolving these unique groups away.
This item shows us that the
clothing louse emerged around 170,000 years ago. Once again this is an adaptation that could
well emerged locally as conditions insisted.
Get driven up a mountain and the nights become just too cold. From there necessity soon starts the process of
providing some form of clothing and that was usually some form of plant
fiber. Skins take far too much
preparation to be quickly adopted and they are also far too warm for marginal need.
Besides, protecting the genitals
likely had a far longer history for simple practical reasons. That may also have provide a haven for
clothing lice.
We were all naked until 170,000 years ago
Jan 07, 2011
Clothing first appeared 170,000 years ago. That's what University of Florida researchers have deduced from an
unlikely source - the annoying clothing louse.
David Reed, associate curator of mammals at the Florida Museum of Natural
History on the University of Florida campus, worked with colleagues
worldwide for five years to sequence the DNA of clothing lice to determine when
they first began to diverge from the harmless but cringe-inducing head louse.
The study, in this month's print edition of Molecular Biology and Evolution, finds that the one louse
species began to diverge into two about 170,000 years ago, 70,000 years before
humans started migrating to colder climates, which began about 100,000 years
ago.
Because clothing doesn't last for 170,000 years, looking at lice was
the best way to deduce this.
Interestingly, humans seem to have started wearing clothes well after
they lost body hair, which genetic skin-coloration research puts at about 1
million years ago. That means that people spent a good long while wandering
around without protective and warming body hair and without clothing, says
Reed.
"It wasn't until they had clothing that modern humans were then
moving out of Africa into other parts of the
world," Reed said.
A previous study of clothing lice in 2003 by geneticists at the Max
Planck Institute in Leipzig ,
Germany ,
estimated humans first began wearing clothes about 107,000 years ago. But the Florida researchers
think their data and calculation methods are more precise.
This means modern humans probably started wearing clothes on a regular
basis to keep warm when they were first exposed to Ice Age conditions, Ian Gilligan, lecturer in the School
of Archaeology and Anthropology at The
Australian National University
said in a release.
While the last Ice Age occurred about 120,000 years ago, from the study
results humans probably began wearing clothes in the one before it, 180,000
years ago. Modern humans first appeared about 200,000 years ago.
By Elizabeth Weise
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