The researchers were surprised to find that even individuals living as far apart as Britain and Turkey shared a chunk of genetic material 20 percent of the time. To explain that degree of genetic commonality, the researchers say those pairs of individuals would have to have a huge number of common genealogical ancestors 1,000 years ago — a number that takes in everyone who was alive in Europe back then.
Original Story:
http://cosmiclog.nbcnews.com/_news/2...tists-say?lite

Original Study in full:
http://www.plosbiology.org/article/i...o-1001555-g001