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, ...

Physicists claim they may have found a long-awaited explanation for dark energy, the mysterious force that's driving the accelerated expansion of the universe, a new preprint study hints. Their ...

Time travel has long been dismissed as impossible due in part to the infamous "grandfather paradox." This conundrum asks what would happen if someone traveled back in time and prevented their ...