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Based on two genes, I can tell who you're friends with on Facebook




Friendship bracelet looks oddly like a double helix...
Friendship bracelet looks oddly like a double helix...
mr-football/Flickr (cc by-nd)

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What role do your genes play in your friendships? A study published this week in The Proceedings of the National Academy of Sciences says there is evidence that our biology has a hand in how we choose our friends. James Fowler is a social scientist at UC San Diego and he is the author of the study. He crossmapped human genomes with trees of Facebook friends.