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

A 12-year-old boy in 1953 received a phone call from a voice claiming to be an AI from the future. Decades later, he became a ...

Robert Zemeckis' marvelous sci-fi comedy reveals new bits of genius with every rewatch. As social criticism, it's right up ...