Imagine a clock that doesn’t have electricity, but its hands and gears spin on their own for all eternity. In a new study, physicists at CU Boulder have used liquid crystals, the same materials that ...

If you had all of space-time to visit, all of the history of the universe at your fingertips… where would you go? A team of ...

From phone boxes and flux capacitors to black holes and hot tubs, sci-fi has created plenty of ways to explore the fourth dimension. When you purchase through links on our site, we may earn an ...

China has built a machine so extreme that its designers say it can squeeze centuries of geological change into a few days of lab time, effectively compressing the way matter experiences time and space ...

Spacetime isn’t something that exists; it’s a model for describing how events happen. Treating events as objects creates philosophical confusion and fuels misconceptions, such as time-travel paradoxes ...

The transfiguration and the mystery of time and space. Earlier this year, I asked a friend to be a time traveler for a moment, and she and I ended up in the same place. The time machine wasn’t literal ...