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Time Travel

Program Overview


NOVA examines the feasibility of time travel.

The program:

  • challenges early theories that time travel might be possible using a black hole.

  • describes how wormholes, predicted by Einstein's theories, might provide a shortcut through time and space.

  • shows how modern jet travel and atomic clocks have been used to prove Einstein's theory of special relativity.

  • presents the views of such scientists as Carl Sagan, Stephen Hawking, and Kip Thorne.

  • examines the consequences of the grandfather paradox and shows how laws of physics might prevent time travelers from changing the past, thereby affecting the future.

  • presents a controversial experiment that claims to have sent a signal faster than the speed of light.

  • introduces reasoning that the laws of relativity prevent a time traveler using a wormhole time machine from going back to a time before the machine was built.

  • concludes with scientists disagreeing about the feasibility of time travel.

Teacher's Guide
Time Travel
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