11/28/2009 05:12 am ET Updated May 25, 2011

Connected: New Book Says Humans "Behave Like Flocks Of Birds"

The interconnected web of our friends, family, neighbors and acquaintances may dominate our lives more than we know.

They've always been there, making up our social support systems. But now, largely thanks to the burgeoning popularity of online social networks like Facebook, researchers are discovering what a powerful influence our connections -- both online and off -- really have over our lives.

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