The grandfather paradox is just one of the thorny logical problems that arise with the concept of time travel. But one ...

One of the most famous paradoxes ever, the grandfather paradox, cautions against making changes that could break the timeline if you were to ever travel back in time. But, according to one scientist, ...

It's almost impossible to wrap your head around how mind-blowing it would be to see a real-life time machine in action—talk ...

Vanderbilt University physicist Lorenzo Gavassino isn't so sure this is as big an obstacle as time-traveler pessimists have made out. In a recent examination of the finer details on entropy, space, ...

Work reveals new ways to understand and manipulate electrons in materials. MIT physicists, in collaboration with colleagues, ...