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Is time travel possible?
Brains On! Science podcast for kids
Time Travel Backwards Into the Past
The more gravity something has, the slower time goes. So if you could somehow go hang out on a super large planet and stayed there for a few years then came back to earth, you would have aged less than everyone else. The catch with both is that it's a one way ticket. You can travel into the future, but you can never go back. That suddenly seems less exciting.
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