Time travel has shifted from pure fantasy to a serious, if highly constrained, topic in modern physics. The equations that describe gravity, quantum fields and the structure of spacetime now allow ...

Predestination doesn’t waste time trying to explain the time travel technology, and it doesn’t need to, because it’s so coherent and straightforward, you naturally see that it makes sense right away.

Time travel is one of the hallmarks of science fiction, but many time-travel-based movies have plots that leave one with a headache just thinking about them. What if you could travel into the past, ...