Our universe plays by certain rules, which originate from different branches of physics. But sometimes the rules seem ...

Because the moon has less gravity than Earth does, time passes slightly differently there. This effect was first predicted by ...

An equation of motion in the presence of a drag force proportional to the velocity is derived in the framework of alternative ...

In an effort to bring together the domains of gravity and quantum theory, Albert Einstein and Nathan Rosen proposed a ...

Wormholes are often imagined as tunnels through space or time—shortcuts across the universe. But this image rests on a ...

If you're going to Mars you'd best take along a jar of anti-aging cream because while you're there you're going to age faster than on Earth thanks to the Theory of Relativity. It's only 477 millionths ...

Einstein’s claim that the speed of light is constant has survived more than a century of scrutiny—but scientists are still ...

Time travel has shifted from pure fantasy to a serious, if highly constrained, topic in modern physics. The equations that describe gravity, quantum fields and the structure of spacetime now allow ...

Quantum mechanics is rich with paradoxes and contradictions. It describes a microscopic world in which particles exist in a ...

The answer comes from a counterintuitive result of special relativity, a field of physics which is notoriously difficult to ...