Ugly Bump.
Posted on 04/22/2010 5:12:55 AM PDT by Pharmboy
Genetic data points to ancient liaisons between species.
Archaic humans such as Neanderthals may be gone but they're not forgotten — at least not in the human genome. A genetic analysis of nearly 2,000 people from around the world indicates that such extinct species interbred with the ancestors of modern humans twice, leaving their genes within the DNA of people today.
The discovery, presented at the annual meeting of the American Association of Physical Anthropologists in Albuquerque, New Mexico, on 17 April, adds important new details to the evolutionary history of the human species. And it may help explain the fate of the Neanderthals, who vanished from the fossil record about 30,000 years ago. "It means Neanderthals didn't completely disappear," says Jeffrey Long, a genetic anthropologist at the University of New Mexico, whose group conducted the analysis. There is a little bit of Neanderthal leftover in almost all humans, he says.
The researchers arrived at that conclusion by studying genetic data from 1,983 individuals from 99 populations in Africa, Europe, Asia, Oceania and the Americas. Sarah Joyce, a doctoral student working with Long, analyzed 614 microsatellite positions, which are sections of the genome that can be used like fingerprints. She then created an evolutionary tree to explain the observed genetic variation in microsatellites. The best way to explain that variation was if there were two periods of interbreeding between humans and an archaic species, such as Homo neanderthalensis or H. heidelbergensis.
"This is not what we expected to find," says Long.
Using projected rates of genetic mutation and data from the fossil record, the researchers suggest that the interbreeding happened about 60,000 years ago in the eastern Mediterranean and, more recently, about 45,000 years ago in eastern Asia. Those two events happened after the first H. sapiens had migrated
(Excerpt) Read more at nature.com ...
Ugly Bump.
Well, that certainly clears up where Al Franken and Keith Obermann came from!
You see faces like that at heavy-metal rock concerts.
The species all get prettier at closing time.
When you start with a flawed theory, you are always having to look for the "best way" to explain the obvious, things that always seem to "surprise" you, but never enough so you wonder why you could be so "surprised" so often at the evidence not matching up with what the theory predicts.
Wasn't that sung by Mickey Gilleyanthropus??
I was either him or his close relative Jerry L Lewiserectus.
It.
You beat me to it.
“The ancient mitochondrial DNA came from a piece of finger bone, which the groups haven’t identified by species. It could be Neanderthal, a new Homo species or some other archaic form — like H. erectus, who spread to Oceania by 1.8 million years ago.”
Let me see... they don’t know the species of the original DNA but they draw broad sweeping conclusions. LOL
Well, I guess the particular combo of genes is enough to give them that info. After all, it couldn’t be a hippo or an alligator with those genes...
You mean like Ted Danson and Whoopi Goldberg?
|
|
|||
Gods |
Thanks Pharmboy!To all -- please ping me to other topics which are appropriate for the GGG list.The Neandertal EnigmaFrayer's own reading of the record reveals a number of overlooked traits that clearly and specifically link the Neandertals to the Cro-Magnons. One such trait is the shape of the opening of the nerve canal in the lower jaw, a spot where dentists often give a pain-blocking injection. In many Neandertal, the upper portion of the opening is covered by a broad bony ridge, a curious feature also carried by a significant number of Cro-Magnons. But none of the alleged 'ancestors of us all' fossils from Africa have it, and it is extremely rare in modern people outside Europe." [pp 126-127] |
||
|
· Discover · Nat Geographic · Texas AM Anthro News · Yahoo Anthro & Archaeo · Google · · The Archaeology Channel · Excerpt, or Link only? · cgk's list of ping lists · |
|||
[singing] swing low, sweet chariot...
Who is the dude in the dress?
Ya think?
Probably because the latest research says they were humans!
:’)
Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.