tveskägg skrev:De kanske inte kom i kontakt med andra grupper på många generationer?
http://en.wikipedia.org/wiki/Toba_catastrophe_theory

"Scientists claim to have the first persuasive evidence that Neanderthals wore "body paint" 50,000 years ago.

The team report in Proceedings of the National Academy of Sciences (PNAS) that shells containing pigment residues were Neanderthal make-up containers.

Scientists unearthed the shells at two archaeological sites in the Murcia province of southern Spain.

The team says its find buries "the view of Neanderthals as half-wits" and shows they were capable of symbolic thinking.

Professor Joao Zilhao, the archaeologist from Bristol University in the UK, who led the study, said that he and his team had examined shells that were used as containers to mix and store pigments.

Black sticks of the pigment manganese, which may have been used as body paint by Neanderthals, have previously been discovered in Africa.

"[But] this is the first secure evidence for their use of cosmetics," he told BBC News. "The use of these complex recipes is new. It's more than body painting."

The scientists found lumps of a yellow pigment, that they say was possibly used as a foundation.

They also found red powder mixed up with flecks of a reflective brilliant black mineral.


The shells were coated with residues of mixed pigments
Some of the sculpted, brightly coloured shells may also have been worn by Neanderthals as jewellery.

Until now it had been thought by many researchers that only modern humans wore make-up for decoration and ritual purposes.

There was a time in the Upper Palaeolithic period when Neanderthals and humans may have co-existed. But Professor Zilhao explained that the findings were dated at 10,000 years before this "contact".

"To me, it's the smoking gun that kills the argument once and for all," he told BBC News.

"The association of these findings with Neanderthals is rock-solid and people have to draw the associations and bury this view of Neanderthals as half-wits."

Professor Chris Stringer, a palaeontologist from the Natural History Museum in London, UK, said: "I agree that these findings help to disprove the view that Neanderthals were dim-witted.

But, he added that evidence to that effect had been growing for at least the last decade.

"It's very difficult to dislodge the brutish image from popular thinking," Professor Stringer told BBC News. "When football fans behave badly, or politicians advocate reactionary views, they are invariably called 'Neanderthal', and I can't see the tabloids changing their headlines any time soon."

These findings have important implications for the understanding of the archaic features found in the anatomy of a 30,000 year old child unearthed at Lagar Velho, Portugal. With the last of the Iberian Neanderthals dating to many millennia before the child was born, 'freak' crossbreeding between immediate ancestors drawn from distinct 'modern' and 'Neanderthal' gene pools cannot be a viable explanation. The skeleton's archaic features must therefore represent evolutionarily significant admixture at the time of contact, as suggested by the team who excavated and studied the fossil.

rdos skrev:Nytt blogginlägg för de som är intresserade:
http://blog.rdos.net/?p=61

Zombie skrev:Jag lyckas inte läsa ut ur den där artikeln varför aurignacienkulturen måste innebära neandertalarfritt grannskap. Visar Zilhão (eller den han bygger det på) det så undrar jag var.

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 out of Africa, says Long. His group didn't find evidence of interbreeding in the genomes of the modern African people included in the study.

The researchers suggest that the population from the first interbreeding went on to migrate to Europe, Asia and North America. Then the second interbreeding with an archaic population in eastern Asia further altered the genetic makeup of people in Oceania.

The talk at the anthropology meeting caught the attention of many researchers, some of whom have been trying to explain puzzling variations in the human genome. "They are onto something," says Noah Rosenberg, an anthropological geneticist at the University of Michigan in Ann Arbor, who heard the talk.

A test of the New Mexico team's proposals may come soon. Svante Pääbo and colleagues at the Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany, announced early last year that they had finished sequencing a first draft of the Neanderthal genome, and they are expected to publish their work in the near future. Pääbo's earlier studies on components of Neanderthal genomes largely ruled out interbreeding, but they were not based on more comprehensive analyses of the complete genome.

Linda Vigilant, an anthropologist at the Planck Institute, found Joyce's talk a convincing answer to "subtle deviations" noticed in genetic variation in the Pacific region.

"This information is really helpful," says Vigilant. "And it's cool."

The paleontological record also is producing fossils that complement such interbreeding theories. Pääbo's team and Russian colleagues recently reported the mitochondrial genome of an archaic human from the Altai Mountains — in southern Siberia near ancient Asian trade routes1.

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.

The Pääbo team reported that the bone was from an individual that lived 30,000–48,000 years ago in Denisova Cave, near where both modern humans and Neanderthals then dwelled. But the age of the bone has been questioned by researchers, who say the cave's sediments may have been reworked, making the bone's layer older.

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At the anthropology meeting, Theodore Schurr, a molecular anthropologist at the University of Pennsylvania in Philadelphia, said the genetic model showing interbreeding raises questions about the range of species, like H. heidelbergensis. He noted that human skeletons found at Lake Mungo in New South Wales, Australia, have robust features, which may represent the result of interbreeding; they are dated to more than 20,000 years ago.

Keith Hunley, another member of the New Mexico group, said the team is now moving to publish its results in the near future.

References
Krause, J. et al. Nature doi:10.1038/nature08976 (2010).

Obotlig skrev:Ja, vad säger allt detta då? Om det stämmer med den här teorin, hur ska man till att leva? Nåt måste ju finnas att gå på ialla fall, miljö, mediciner vadsomhelst

Obotlig skrev:Jo, och det här med tungmetallförgiftning är ju en annan sak som jag inte vet om det har något samband med din teori, men efersom du är smart så kunde du ju hjälpa till att forska där också vid intresse. Jag själv sitter inne med en del material, det finns säkert fler här också. Med material menar jag skriftliga anomala koncentrationer av tungmetaller, gjort genom legitima test. Nu pratar vi inte om vaccinationer, utan mest tror jag om att leverns avgiftningsförmåga är nedsatt hos autister. Själv skulle jag gärna vilja ha klarhet i vad min höga koncentration av tungmetaller gör med min kropp.

Obotlig skrev:Men om man säger såhär då, vilka tycker du är dom starkaste bevisen för att teorin kan stämma?