Humans 'left Africa much earlier'

BBC ^ | January 27, 2011 | Paul Rincon

[decimon]

Modern humans may have emerged from Africa up to 50,000 years earlier than previously thought, a study suggests.

Researchers have uncovered stone tools in the Arabian peninsula that they say were made by modern humans about 125,000 years ago.

The tools were unearthed at the site of Jebel Faya in the United Arab Emirates, a team reports in the journal Science.

The results are controversial: genetic data strongly points to an exodus from Africa 60,000-70,000 years ago.

Simon Armitage, from Royal Holloway, University of London, Hans-Peter Uerpmann, from the University of Tuebingen, Germany, and colleagues, uncovered 125,000-year-old stone tools at Jebel Faya which resemble those found in East Africa at roughly the same time period.

The authors of the study say the people who made the tools were newcomers in the area with origins on the other side of the Red Sea.

The researchers were able to date the tools using a light-based technique, which tells scientists when the stone artefacts were buried.

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Multiple migrations?

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[SunkenCiv]

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[allmendream]

There are not three distinct races. Residual traces of what? The genes that put melanin in the skin? There most certainly are “residual traces” in that the genes work perfectly in the blackest of black people, and they work less so in the whitest of white people, and not at all in an albino.

Why are the races so distinct from each other? Genetically they are not, we are a very homologous species as far as DNA similarity goes, but there are obvious differences that are mostly “skin deep” as it were.

Why do you think a black person in Africa who goes half naked every day is more susceptible to sunburn than an Irish red head who freckles and burns in 15 minutes? Someone told you that once and you accept it without any more evidence, despite any and all other evidence?

There is such a thing as genetic variation, and there is a lot more of it in Africa than elsewhere. Why would you suppose they would all be the same any more than that your average Norwegian and your average Italian would be same in amount of melanin content in the skin?

So what mechanism do YOU propose is responsible for population differences?

[ReverendJames]

First things first. What do you mean by There are not three distinct races.

Is not black a race? Is not white a race? Is not mongoloid a race? What does the term 'race' mean to you?

[InternetTuffGuy]

Only the coolest, admittedly whackiest, thought provoking books on the origins of mankind around:

http://www.amazon.com/Forbidden-Archeology-Hidden-History-Human/dp/0892132949

[muawiyah]

Neanderthals were widespread in Eur-Asia, and DNA analysis reveals there were human but different than modern humans.

These quite husky chaps appeared to suffer no vitamin deficiencies!

[allmendream]

Where do you draw the line that you get three, let alone three that are distinct? Where do you shoehorn people from New Guinea and Australia - "Negroid" because of the color of their skin? They are closer to both Asians and Caucasians than Africans.

[JoeProBono]

[allmendream]

How did there come to be three races, or forty two different races, or any number of different races?

Do you have an explanation for how?

Are you at all interested in finding one, or knowing one?

Or are you like 0bama in that it is “above your pay grade”?

[blam]

"Oppenheimer when asked if his was the first ever detonation of of a nuclear bomb, he said. ‘Yes, in modern times’."

There's some evidence in the Venona Files that Oppenheimer colluded with Claus Fuchs to give the Soviets the US's atomic secrets.

[Monkey Face]

Interesting.
So far, I’ve only been able to get back to Adam and Eve. Any suggestions?

[muawiyah]

Don't rely too much on the genetic diversity argument. The analysts who determined that DNA shows that the European and Asian ancestry is predominantly that of the San People in Africa ALSO found that there are only 14 major haplogroups in Africa, one of which is that of the San People. The San, in turn are the source of the other 13 groups.

So, let's say there's one race ~ the San People ~ all that does is cut us off from the differences in the other 13 main haplogroups, plus the various subgroups in the Northern hemisphere.

Interesting that ONE offshoot of the San ~ the folks who moved out of Africa some 75,000 years ago, constitutes about 85% of modern humans!

Does that mean that Africa is not good for us? Or does that say something about us?

[allmendream]

Africa is actually a not very good place for humans, and hasn’t been. That is where most human pathogens are found. That is where malaria is such a fact of life that sickle cell anemia is also a fact of life.

[allmendream]

Nice that you can get back, but how do you go forward?

How did humans develop our obvious differences between populations?

What was the mechanism?

[ReverendJames]

Ok, well you've now lost the argument when you go on a personal attack and try to compare me with Obama and the "above your pay grade" line. I thought we had a nice discussion going here and you have to interject that into the equation. Nice chatting with you.

Regards,

[McCloud-Strife]

Proof modern humans arived 150,000 years ago

[aruanan]

That is where malaria is such a fact of life that sickle cell anemia is also a fact of life.

It's carrying the sickle cell trait that increases survivability if you contract malaria.

[ReverendJames]

Ok, well if you look at your chart going backwards you’ll see the distinct differences. Is a Norwegian in the negroid group? Is an Australian Aboriginal in the Mongolian group?

[blam]

"Neanderthals were widespread in Eur-Asia, and DNA analysis reveals there were human but different than modern humans.

We are Neanderthals:

Neanderthals, Humans Interbred, DNA Proves

Recently, a new human species has been discovered in Siberia (see below) and the DNA from these new humans are found only in the DNA of modern Melanesians.

Siberian Fossils Were Neanderthals’ Eastern Cousins, DNA Reveals

[aruanan]

There most certainly are “residual traces” in that the genes work perfectly in the blackest of black people, and they work less so in the whitest of white people, and not at all in an albino.

The genes work perfectly well in both light and dark people. It takes about 1000 years before skin color starts to shift lighter or darker in a population depending on where it moves to.

[allmendream]

I didn't compare you to 0bama, stop the histrionics.

I asked if you considered the subject “above your pay grade” as 0bama famously copped out.

You were copping out, not being 0bama.

If I asked someone “You ‘pay for that microphone’ like Reagan?” I wouldn't be comparing them to Reagan, but using a famous example of the phrase.

Apparently such an answer is “above your pay grade”.

Nice cop out.