Even if it turns out that time loops never take shape, studying them provides key insights into the deepest rules of reality.

Time travel has shifted from pure fantasy to a serious, if highly constrained, topic in modern physics. The equations that ...

This month marks 40 years since Michael J. Fox, as Marty McFly, jumped into a souped-up DeLorean and went back in time, putting his very future existence at risk. (SOUNDBITE OF FILM, "BACK TO THE ...

Time travel has long been a topic of science fiction, filled with thrilling possibilities and mind-bending problems. The most famous of these problems is the "grandfather paradox". If someone travels ...

Time feels like the most familiar thing in the world, yet it hides one of physics’ hardest questions: why do we only remember ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. It speaks to our deepest regrets and desires — the chance to reconnect with someone now gone, to ...

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, ...

If “Katabasis” author R.F. Kuang could time travel, she’d want to be 18 years old at a Beatles concert. Living in the '60s is an enticing idea for Kuang, who's known for fantasy books “Babel” and “The ...