A ring in space, at least on paper, can do something a black hole cannot. It can connect distant regions without forcing anything through crushing gravity or a singularity.

Time travel has long been a favorite idea in science fiction. Stories about changing the past or visiting the future have ...

Add Yahoo as a preferred source to see more of our stories on Google. A new tachyon theory argues faster-than-light particles may fit within relativity without the old paradoxes about time and ...

The idea of the tachyon particle first gained traction in the early 1900s, when Albert Einstein theorized that a particle that could travel faster than the speed of light could exist. The term wasn't ...

So can you slam protons together so hard that the collision creates a particle that can travel forward and backward in time? From Vanderbilt: “One of the major goals of the collider is to find the ...

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 ...

When all else fails and the apocalypse descends, sometimes the only recourse is to turn back the clock. Every superhero franchise has dabbled in this in some capacity, be it X-Men, the Avengers, or ...