In an advance, online publication of Nature this week, an international research team reports "the genome-wide structure of the Jewish people." The researchers used high-density bead arrays to genotype individuals from 14 Jewish diaspora communities and when compared with the patterns of genome-wide diversity from 69 non-Jewish populations, the team distinguished "the variegated genetic architecture of the Middle East, and trace the origins of most Jewish Diaspora communities to the Levant