The ability to jump forward and backwards in time has long fascinated science fiction writers and physicists alike. So is it really possible to travel into the past and the future? Doctor Who is ...

Could woolly mammoths be de-extincted? Will super-soldiers fight our wars? Our sci-fi series explores the latest research to sift fact from fiction. See all stories. Perhaps you’ve already noticed it; ...

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 ...

The universe wasn't designed to make life easy for science-fiction writers. Nowhere is this more obvious than if you are trying to write a grand space opera. You know the sort of thing: a dashing ...

Add Yahoo as a preferred source to see more of our stories on Google. If traveling into the past is possible, one way to do it might be sending people through tunnels in space. by raggio5 via Pixabay ...

The Hafele–Keating experiment showed that time slowed down with increased speed(Getty Images) Time travel happens all the time: we're usually travelling smoothly ...