Time travel paradoxes like the grandfather problem and causal loops show how the universe may resist changes or trap actions in endless cycles. Trump wants to ‘end’ largest US infrastructure project, ...

Some time travel movies totally miss the mark and create plot holes, while others get the science absolutely right.

Here’s what you’ll learn when you read this story: In a peer-reviewed paper, a scientist says he has mathematically proven the physical feasibility of a specific kind of time travel. The paper appears ...

The grandfather paradox is just one of the thorny logical problems that arise with the concept of time travel. But one physicist says he has resolved them. When you purchase through links on our site, ...

Likewise, philosophers have suggested that time travel makes paradox possible – like the grandfather paradox. If time travel is possible, I can travel back in time and kill my grandfather before he ...

Time travel is deterministic and locally free, a paper says—resolving an age-old paradox. This follows research observing that the present is not changed by a time-traveling qubit. It’s still not very ...