Explore the science and mystery of time travel — from Einstein’s relativity and paradoxes to wormholes and real-life claims.

Time travel is deterministic and locally free, a paper says—resolving an age-old paradox. This follows research observing that the present is not changed by a time-traveling qubit. It’s still not very ...

It’s not just in your head — time can actually flip. Physicists in New York have pulled off what sounds like a page ripped from a sci-fi script: They’ve confirmed that “time mirrors,” a trippy ...

J.J. Abrams revived the "Star Trek" films in 2009 with a shift to the Kelvin timeline, built around a twisty use of time ...