[lbo-talk] Is Sex Fun for Girls? --> Sociobiology, Sex, and History

andie nachgeborenen andie_nachgeborenen at yahoo.com
Mon Jan 22 12:26:11 PST 2007


An older date is stronger support for my theory.

--- Charles Brown <cbrown at michiganlegal.org> wrote:


>
> I think the 40,000 years ago figure as a time of
> some significant change is
> defunct in current paleo-anthropology. 30 or 40
> years ago, the 40,000
> figure was used when it was said that "modern man"
> emerged in Europe and
> there were fossils (Cro-Magnon) in Europe alone from
> 40,000 ago. Now the
> emergence of homo sapiens from the missing link
> species is more definitely
> placed in Africa , and at 200,000 years earlier by
> mainstream (European
> )anthropology. In other words , the Cro-magnon of
> 40,000 years ago are no
> longer considered the first homo sapiens.
>
> Charles
>
> ^^^^^^
>
> Homo sapiens
> H. sapiens ("sapiens" means wise or intelligent )
> has lived from about
> 250,000 years ago to the present. Between 400,000
> years ago and the second
> interglacial period in the Middle Pleistocene,
> around 250,000 years ago, the
> trend in cranial expansion and the elaboration of
> stone tool technologies
> developed, providing evidence for a transition from
> H. erectus to H.
> sapiens. The direct evidence suggests there was a
> migration of H. erectus
> out of Africa, then a further speciation of H.
> sapiens from H. erectus in
> Africa (there is little evidence that this
> speciation occurred elsewhere).
> Then a subsequent migration within and out of Africa
> eventually replaced the
> earlier dispersed H. erectus. This migration and
> origin theory is usually
> referred to as the single-origin theory. However,
> the current evidence does
> not preclude multiregional speciation, either. This
> is a hotly debated area
> in paleoanthropology.
>
> Current research establishes that human beings are
> highly genetically
> homogenous, meaning that the DNA of individual Homo
> sapiens is more alike
> than usual for most species, a result of their
> relatively recent evolution.
> Distinctive genetic characteristics have arisen,
> however, primarily as the
> result of small groups of people moving into new
> environmental
> circumstances. Such small groups are initially
> highly inbred, allowing the
> relatively rapid transmission of traits favorable to
> the new environment.
> These adapted traits are a very small component of
> the Homo sapiens genome
> and include such outward "racial" characteristics as
> skin color and nose
> form in addition to internal characteristics such as
> the ability to breathe
> more efficiently in high altitudes.
> H. sapiens idaltu , from Ethiopia, lived from about
> 160,000 years ago
> (proposed subspecies). It is the oldest known
> anatomically modern human.
>
> http://en.wikipedia.org/wiki/Human_evolution
>
>
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>
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