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Is time travel possible?

Mysteries of Science

00:00

Are You Younger Than People on Earth?

The speeds the astronauts are travelling at means that time slows down for them and they age slower than people on Earth. This is known as time dilation. It would be great to speak to a real-life astronaut to find out what this feels like. Well everybody say hello to British astronaut and I guess now time traveler Tim Peake.

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