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    The Father of Inflation Clears Up a Big Misunderstanding

    Last week researchers working on the BICEP2 experiment in Antarctica announced that they’d seen solid evidence of gravitational waves that emerged very early in the Universe’s history. This discovery lent support to inflation, a theory of cosmology long popular among physicists but still lacking in direct proof. (To learn more about the recent discovery and […]

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    Initial Conditions

    Sean Carroll and Alan Guth talk about time.