How Does Time Travel Work in Movies and Real Life?

Time travel is like riding a really fast train. In movies, people jump in a machine and go to the past or future, it’s super fun! But in real life, time can stretch or shrink depending on how fast you move or how strong gravity is. Scientists call this relativity. So if you zoom away from Earth at almost the speed of light, you might come back to find everyone has aged 10 years while you’ve only aged one!

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Examples

If you ride a super-fast spaceship for a year and come back, your brother on Earth might have aged ten years!
In some movies, people use a time machine to go back in time and change the past, like fixing their mistakes.
A wormhole could act as a shortcut through space-time, letting someone jump from one moment in time to another.

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Categories: Physics · time travel,relativity,science fiction