Why did European DNA suddenly change 4000 years ago? Experts say Stonehenge may hold the key

The genetic makeup of Europe mysteriously transformed about 4,000-5,000 years ago, researchers have discovered.
An Australian team found the unexplained change while analysing several skeletons unearthed in central Europe that were up to 7,500 years old. They say the rapid expansion of the Bell Beaker culture, which is believed to have been instrumental in building the monoliths at Stonehedge, could hold the key.

'What is intriguing is that the genetic markers of this first pan-European culture, which was clearly very successful, were then suddenly replaced around 4,500 years ago, and we don't know why,' study co-author Alan Cooper of the University of Adelaide Australian Center for Ancient DNA said. 'Something major happened, and the hunt is now on to find out what that was.' ...


[link to www.dailymail.co.uk]