770,000 Tubes of Spit Help Map America’s Great Migrations

Posted by Jean-Yves on Feb 9, 2017

America is not the great melting pot that poets like Ralph Waldo Emerson once extolled. At least, that’s not the story that DNA tells, according to the genealogy company Ancestry. Using more than 770,000 spit samples taken from their customers over the last five years, its researchers mapped how people moved and married in post-colonial America. And their choices—especially the ones that kept communities apart—shaped today’s modern genetic landscape.

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