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# New Research Shows That Time Travel Is Mathematically Possible

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Physicists have developed a new mathematical model that shows how time travel is theoretically possible. They used Einstein's Theory of General Relativity as a springboard for their hypothetical device, which they call a Traversable Acausal Retrograde Domain in Space-time (TARDIS).

Even before Einstein theorized that time is relative and flexible, humanity had already been imagining the possibility of time travel. In fact, science fiction is filled with time travelers. Some use metahuman abilities to do so, but most rely on a device generally known as a time machine. Now, two physicists think that it’s time to bring the time machine into the real world — sort of.

“People think of time travel as something as fiction. And we tend to think it’s not possible because we don’t actually do it,” Ben Tippett, a theoretical physicist and mathematician from the University of British Columbia, said in a UBC news release. “But, mathematically, it is possible.”

Essentially, what Tippet and University of Maryland astrophysicist David Tsang developed is a mathematical formula that uses Einstein’s General Relativity theory to prove that time travel is possible, in theory. That is, time travel fitting a layperson’s understanding of the concept as moving “backwards and forwards through time and space, as interpreted by an external observer,” according to the abstract of their paper, which is published in the journal Classical and Quantum Gravity.

Oh, and they’re calling it a TARDIS — yes, “Doctor Who” fans, hurray! — which stands for a Traversable Acausal Retrograde Domain in Space-time.

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