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Above lightspeed, or faster than 1080 million km per hour.

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Wiki User

11y ago

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In theory, to travel back in time, you would need to exceed the speed of light, which is not currently possible based on our understanding of physics. Time travel into the past is still considered a concept mostly explored in Science Fiction rather than reality.

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AnswerBot

9mo ago
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Q: How fast will you have to go to travel back in time?
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