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New Twist On Out-Of-Africa Theory
ABC Science News ^ | 7-14-2004 | Judy Skatssoon

Posted on 07/14/2004 8:53:47 AM PDT by blam

New twist on out-of-Africa theory

Judy Skatssoon
ABC Science Online
Wednesday, 14 July 2004

Homo erectus, the species thought to be the first to leave Africa for Eurasia in the out-of-Africa model of human origin (Image: Science)

Early humans made love, not war, according to new DNA analysis presented at a genetics conference that gives a new twist on the out-of-Africa hypothesis of human origins.

U.S. researcher Professor Alan Templeton of Washington University, St Louis, debunks the prevailing version of the out-of-Africa hypothesis, which says early humans migrated from Africa and wiped out Eurasian populations.

Instead, they bred, he told the Genetics Society of Australia's annual conference in Melbourne this week.

Templeton said his evidence didn't support the so-called replacement theory in which African hominids caused the extinction of other Homo species.

Instead, he said his analysis of the human genome showed prehistoric gene-swapping created a single evolutionary lineage beginning in Africa and ending where we are today.

He looked at mitochondrial DNA, as well as DNA on a range of chromosomes including X and Y.

"The genetic legacy of current humans is predominantly of African origin," he said.

Templeton is the first to suggest expansion out of Africa occurred in three waves: 2 million years ago, 800,000 years ago and 100,000 years ago.

The alternative view suggests that expansion out of Africa occurred twice and caused the genetic extinction of existing populations, with the colonisers later diversifying into separate races.

What about races?

But Templeton said this extinction never happened and a combination of movement and interbreeding meant diversification of races didn't occur.

"We really have to abandon the idea of race. It actually does not reflect the genetic differences we can now measure in an objective fashion."

Templeton said the differences between human populations today were based on geography not genetics.

This meant a Norwegian would be more closely related than a Fijian to someone from sub-Saharan Africa.

"We do see differences in different regions of the world but the best indicator of those differences is simply geographical distance and not things like skin colour."

Templeton said his data was inconclusive on whether interbreeding also occurred with Neanderthals.

But he said there was fossil evidence that this probably occurred, which would imply a bit of Neanderthal could live on in us all.

Australian geneticist Associate Professor Philip Batterham from the University of Melbourne said the research showed humanity was far more closely related that previously thought and that race was a cultural phenomenon.

Templeton's research was published in the journal Nature in March 2002.


TOPICS: News/Current Events
KEYWORDS: africa; archaeology; crevolist; economic; genetics; ggg; godsgravesglyphs; history; multiregionalism; neandertal; new; out; theory; twist
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This is more in line with my thoughts on this subject.
1 posted on 07/14/2004 8:53:48 AM PDT by blam
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To: FairOpinion

GGG Ping.


2 posted on 07/14/2004 8:54:18 AM PDT by blam
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To: blam

I am full blooded Neanderthal.


3 posted on 07/14/2004 8:58:28 AM PDT by Conspiracy Guy (Kerry has a Carter Plan. Bush has a Reagan Plan. You choose which is your plan.)
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To: Conspiracy Guy
I am a right-wing, reactionary, knuckle dragging, gun-toting, hirsute Neanderthal and proud of it.
4 posted on 07/14/2004 9:02:38 AM PDT by Little Ray (John Ffing sKerry: Just a gigolo!)
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To: blam

"The genetic legacy of current humans is predominantly of African origin,"

Where are my reparations?


5 posted on 07/14/2004 9:02:42 AM PDT by ConservativeOrBust
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To: blam
Templeton is the first to suggest expansion out of Africa occurred in three waves: 2 million years ago, 800,000 years ago and 100,000 years ago.

If there was some disaster ~80,000 ya which decreased the Homo Sapiens to 5,000-10,000 individuals how can genetic studies of earlier populations be made?

6 posted on 07/14/2004 9:03:00 AM PDT by Mike Darancette (Absence of evidence is not evidence of absence.)
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To: blam

Homo erectus

-hahahaha (ya so I am childish, sue me)


7 posted on 07/14/2004 9:03:50 AM PDT by goldwaterlives
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To: PatrickHenry; VadeRetro; RadioAstronomer; Ichneumon

Ping-a-ling.


8 posted on 07/14/2004 9:05:46 AM PDT by Junior (FABRICATI DIEM, PVNC)
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To: blam

I really dislike this type of idle speculation being tossed out into the open. Don't get me wrong, I'm a big believer in the ToE and such, but this type of pseudo-guessing simply lends credence to those who claim that the ToE is so fluid that it's utterly worthless. This, in my opinion, is the result of mixing the science behind the ToE with the pseudo-science of archaeology. I think that's a pretty risky thing to do, as it can lead us off into a dozen wrong directions at once, and distract us from the pure science that's helped us come this far in our understanding of our origins.


9 posted on 07/14/2004 9:07:03 AM PDT by NJ_gent
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To: blam
"Templeton said the differences between human populations today were based on geography not genetics."

"Australian geneticist Associate Professor Philip Batterham from the University of Melbourne said the research showed humanity was far more closely related that previously thought and that race was a cultural phenomenon.

Once again, political correctness corrupts science. Race is unquestionably based on genetics. Note that any time there is marriage between Negroid and Caucasoid, Mongoloid and Caucasoid, and any other combination, that the resulting offspring DO follow Mendel's laws of genetics.

10 posted on 07/14/2004 9:09:09 AM PDT by Wonder Warthog (The Hog of Steel)
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To: Mike Darancette
"If there was some disaster ~80,000 ya which decreased the Homo Sapiens to 5,000-10,000 individuals how can genetic studies of earlier populations be made?

That was the Toba super volcano 75,000 years ago. The human survival numbers I see are usually 2,000-5,000 worldwide.

11 posted on 07/14/2004 9:14:22 AM PDT by blam
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To: VadeRetro; jennyp; Junior; longshadow; RadioAstronomer; Physicist; LogicWings; Doctor Stochastic; ..
Evolution Ping! This list is for the evolution side of evolution threads, and maybe other science topics like cosmology.
See the list's description in my freeper homepage. Then FReepmail me to be added or dropped.

(One of the few times I've used my list on a Blam thread.)

12 posted on 07/14/2004 9:14:40 AM PDT by PatrickHenry (#26,303, registered since the 20th Century, never suspended, over 184 threads posted.)
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To: Wonder Warthog

How's that?


13 posted on 07/14/2004 9:15:34 AM PDT by cyborg
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To: Wonder Warthog

Race IS a cultural phenomena. Race is all about politics. Living in the US you would notice this.


14 posted on 07/14/2004 9:17:23 AM PDT by cyborg
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To: Little Ray

We may be related. Do you drink beer?


15 posted on 07/14/2004 9:23:53 AM PDT by Conspiracy Guy (Kerry has a Carter Plan. Bush has a Reagan Plan. You choose which is your plan.)
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To: Little Ray
I have many but this is my newest.


16 posted on 07/14/2004 9:26:19 AM PDT by Conspiracy Guy (Kerry has a Carter Plan. Bush has a Reagan Plan. You choose which is your plan.)
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To: goldwaterlives
"Tell me something, if homo sapiens really were homo sapiens, how come they're not extinct?"
17 posted on 07/14/2004 9:26:21 AM PDT by NYFriend
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To: Conspiracy Guy

18 posted on 07/14/2004 9:26:30 AM PDT by cyborg
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To: blam

This certainly makes more sense of some of the DNA data that has been reported than does the wave of killers theory that had been dominant to date.


19 posted on 07/14/2004 9:27:45 AM PDT by JimSEA ( "More Bush, Less Taxes.")
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To: cyborg

Who dat?


20 posted on 07/14/2004 9:30:10 AM PDT by Conspiracy Guy (Kerry has a Carter Plan. Bush has a Reagan Plan. You choose which is your plan.)
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