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

If time travel is possible, one of the greatest questions is why don’t we see time travelers in the here and now. A new theory explores the idea that time travel creates its own destruction by ...

Is time travel possible, and if it is, what sort of civilizations would result? We'll explore the science that might permit ...