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, ...

While parallel universes are a staple of science fiction, there are some real scientific theories to support them. But if parallel universes do exist, could we ever travel to them? It certainly wouldn ...

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.

Like stretch marks left on skin that expanded too quickly or cracks embedded in freezing ice, cosmic strings are artifacts of what the universe looked like in the moments before it rapidly changed ...

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 ...

Physicists have performed a simulation they say sheds new light on an elusive phenomenon that could determine the ultimate ...

Physicist Lorenzo Gavassino redefines time travel theories, suggesting quantum mechanics and entropy may resolve paradoxes like the Grandfather Paradox, reshaping reality.

From unifying quantum physics and gravity to working out what is dark matter, the universe has some deep questions that ...

This extension challenges conventional notions of causality and offers a glimpse into a radically different universe. Einstein's special relativity, established in 1905, unified space and time ...

A new perspective on the universe could emerge if superluminal ... reshapes fundamental concepts of causality and space-time, much like quantum mechanics does. Physicists Andrzej Dragan and ...

"With evidence that quarks and gluons are entangled, this picture has changed. We have a much more complicated, dynamic system." ...