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Season 4, episode 9. This player now records resume state for the active profile so browse, account, and detail pages can bring you back here quickly.
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The Time Travelers
Is it possible that sightings of alien beings or UFOs may actually be evidence of time travelers from the future? And might ancient astronauts actually be time travelers from our future? Scientists explore the theoretical possibility of time travel. How can it be achieved? And what might people from 10,000 years in the future look like?
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Episode 10: Aliens and Dinosaurs