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Shankar Vedantam

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DAVID GREENE, HOST:

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Imagine a concrete room, not much bigger than a parking space. No window. You're in there 23 hours a day, 7 days a week; you don't know when you'll get out of this room. A month? A year? A decade?

Our minds don't do well with that kind of solitude and uncertainty.

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STEVE INSKEEP, HOST:

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