Hongsheng Zhang of China's University of Jinan has shown that spacetimes with a global null foliation cannot contain closed ...

Einstein’s theories of relativity propose that forward time travel is theoretically feasible by nearing light speeds, but backward time travel presents more challenges. Theoretical models like ...

(andrey_l/Shutterstock) Time travel is a dream shared by pretty much all of us. But the dearth of visitors from the future – and the dismal turnout at the famed time traveler party – is alarming for ...

Time travel makes regular appearances in popular culture, with innumerable time travel storylines in movies, television and literature. But it is a surprisingly old idea: one can argue that the Greek ...

Time travel makes regular appearances in popular culture, with innumerable time travel storylines in movies, television and literature. But it is a surprisingly old idea: one can argue that the Greek ...

Time travel is one of the most captivating tropes in science fiction, inspiring countless stories of adventures through the ...

Have you ever made a mistake that you wish you could undo? Correcting past mistakes is one of the reasons we find the concept of time travel so fascinating. As often portrayed in science fiction, with ...

If you want to attend Stephen Hawking's time travel party, you better figure out how time travel works for a journey back to 2009. Hey everyone, Stephen Hawking is throwing a party, and we're all ...

Unlike many time travel films, Midnight in Paris isn’t focused on the metaphysics of time travel. It has no interest in exploring how time travel works or what implications it has for how we think ...