NPR recently reviewed a writer who knows exactly why you continue to check Facebook every three minutes. The woman, Winifred Gallagher, has just written a book,  New: Understanding Our Need for Novelty and Change, about the human propensity for all things new. More than it just being a symptom of modern consumerism, more than it being a competitive compulsion to get-there-first, Gallagher talks about the biological-neurological yearning for significance. We seek out new things to see if they matter, if they will help us matter, and we quickly decide whether or not this new information-gadget-diet is sufficient to make that…

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