A new theory suggests that gravity could possibly be the result of entropy. If true, this would mean that everything in the ...

For the first time, physicists have watched a beam of positronium, a short‑lived atom made of an electron and its antimatter ...

“Positronium is the simplest atom composed of equal-mass constituents, and until it self-annihilates, it behaves as a neutral ...

A hundred years ago, quantum mechanics was a radical theory that baffled even the brightest minds. Today, it's the backbone ...

Quantum mechanics, the theory that governs the subatomic world, rests on a persistent paradox. It describes particles that ...

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

A new unified theory connects two fundamental domains of modern quantum physics: It joins two opposite views of how a single ...

Now, two unrelated-but-similar experiments confirm that, in a double-slit experiment, detection of a photon’s path (its ...