Undocumented aliens bring a bit of civilization to society - that just might stir things up....
Originally shared by Pierre Markuse
Migrants Brought Farming to Europe, Ancient DNA Suggests
Was the spread of farming a cultural movement or the result of human migration? DNA samples from individuals who lived in hunter-gatherer and agricultural communities 5,000 years ago have brought scientists closer to an answer.
http://www.history.com/news/2012/04/26/migrants-brought-farming-to-europe-ancient-dna-suggests/
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