Neil deGrasse Tyson Explains the Strange Paradoxes of Time Travel

Astrophysicist Neil deGrasse Tyson explains the nature of time and the conundrums of time travel in a recent interview.

Fresh snow fallen on the clock park, a sculpture by artist Klaus Rinke made of 24 station clocks, in Duesseldorf, western Germany, on March 7, 2016. (Photo credit: MAJA HITIJ/AFP/Getty Images)

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