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European Neandertals were on the verge of extinction even before the arrival of modern humans
Date:2/27/2012

New findings from an international team of researchers show that most neandertals in Europe died off around 50,000 years ago. The previously held view of a Europe populated by a stable neandertal population for hundreds of thousands of years up until modern humans arrived must therefore be revised.

This new perspective on the neandertals comes from a study of ancient DNA published today in Molecular Biology and Evolution. The results indicate that most neandertals in Europe died off as early as 50,000 years ago. After that, a small group of neandertals recolonised central and western Europe, where they survived for another 10,000 years before modern humans entered the picture. The study is the result of an international project led by Swedish and Spanish researchers in Uppsala, Stockholm and Madrid.

"The fact that neandertals in Europe were nearly extinct, but then recovered, and that all this took place long before they came into contact with modern humans came as a complete surprise to us. This indicates that the neandertals may have been more sensitive to the dramatic climate changes that took place in the last Ice Age than was previously thought", says Love Daln, associate professor at the Swedish Museum of Natural History in Stockholm.

In connection with work on DNA from neandertal fossils in northern Spain, the researchers noted that the genetic variation among European neandertals was extremely limited during the last ten thousand years before the neandertals disappeared. Older European neandertal fossils, as well as fossils from Asia, had much greater genetic variation, on par with the amount of variation that might be expected from a species that had been abundant in an area for a long period of time.

"The amount of genetic variation in geologically older neandertals as well as in Asian neandertals was just as great as in modern humans as a species, whereas the variation among later European neandertals
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Contact: Love Daln
love.dalen@nrm.se
46-070-777-2794
Uppsala University
Source:Eurekalert  

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