Why did European DNA suddenly change 4000 years ago? Experts say Stonehenge may hold the key
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04/24/2013 06:41 AM
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The LBK group and its descendants were very successful and spread quickly across Europe. "They became the first pan-European culture, if you like," Cooper said. Given their success, it would be natural to assume that members of the LBK culture were significant genetic ancestors of many modern Europeans.
But the team's genetic analysis revealed a surprise: About 4,500 years ago in the mid-Neolithic, the LBK culture was itself displaced. Their haplogroup H types suddenly becamevery rare, and they were subsequently replaced by populations bearing a different set ofhaplogroup H variations. The details of this "genetic turnover" event are murky. Scientists don't know what prompted it, or even where the new colonizers came from.
[link to news.nationalgeographic.com]