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.

Humans have always wanted to change the past or future. However, as much as we might like to travel through time, this ...

Through rigorous analysis, the author presents a surprising scenario that combines quantum mechanics and relativity to demonstrate that, although possible, time travel would be drastically different ...

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 ...