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Neil deGrasse Tyson Explains Time

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Published on Oct 10, 2012

What exactly is time? Where does it come from, how do we observe it, and what does it mean? Neil deGrasse Tyson, astrophysicist, host of StarTalk Radio and director of the Hayden Planetarium, answers this Cosmic Query from a fan in this Behind the Scenes video. With comic co-host Eugene Mirman.

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