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 ...

From H. G. Wells's The Time Machine to Christopher Nolan's Interstellar, the possibility of travelling through time has fascinated people for centuries. But, although it sounds like pure science ...

Limitless Space Institute compares the travel time of spacecraft propelled by nuclear power to that of imaginative fusion ...