A spacecraft traveling at 99 percent the speed of light toward Alpha Centauri would cross 4.3 light-years in what feels like ...

Add Yahoo as a preferred source to see more of our stories on Google. If traveling into the past is possible, one way to do it might be sending people through tunnels in space. by raggio5 via Pixabay ...

Time travel has long lived in the realm of science fiction, but a prominent futurist now argues that humans could effectively move backward in time within just a few years. His claim does not involve ...

Have you ever fantasized about going back in time to relive a moment — or change it? Maybe you’re more interested in traveling to the future where cars fly and the code to immortality has been cracked ...

Have you ever fantasized about going back in time to relive a moment — or change it? Maybe you’re more interested in traveling to the future where cars fly and the code to immortality has been cracked ...

It’s not just in your head — time can actually flip. Physicists in New York have pulled off what sounds like a page ripped from a sci-fi script: They’ve confirmed that “time mirrors,” a trippy ...

A trip through time has always sparked curiosity. The idea that you could step into a machine and emerge in the past or future has captured human imagination for generations. While science fiction ...

Cosmic strings are artifacts of what the universe looked like in the moments before it rapidly changed from a high-energy to low-energy environment—the Big Bang. Today, scientists believe cosmic ...

The first rule of time travel is that you can only travel within your own lifetime. The second rule of time travel is that you can only stay for 90 seconds. And “The Third Rule of Time Travel,” ...