"By Tia Ghose LiveScience The genetic lineage of Europe mysteriously transformed about 4,500 years ago, new research suggests. The findings, detailed Tuesday in the journal Nature Communications, were drawn from several skeletons unearthed in central Europe that were up to 7,500 years old. "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 in a statement. "Something major happened, and the hunt is now on to find out what that was.""
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