For more than a century, gravity has been the immovable backdrop of modern physics, a force that can be described and ...

Quantum theory and Einstein's theory of general relativity are two of the greatest successes in modern physics. Each works ...

This episode of the Physics World Weekly podcast features Alex May, whose research explores the intersection of quantum ...

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

This new propulsion system could rewrite the rules of spaceflight—not to mention completely defy conventional physics.

Of the four fundamental forces of physics, gravity is the one we’re most familiar with in everyday life, but it’s also the only one that can’t currently be explained by quantum physics. Now scientists ...

If you want to understand gravity, it makes sense to study black holes. Nowhere else can you find so much gravity so conveniently compacted into such a relatively small space. In a way, in fact, black ...

The best way to find buried treasure may be with a quantum gravity sensor. In these devices, free-falling atoms reveal subtle variations in Earth’s gravitational pull at different places. Those ...

The flow of time isn’t as consistent as we might think – gravity slows it down, so clocks on the surface of Earth tick slower than those in space. Now researchers have measured time passing at ...