More than a century after Srinivasa Ramanujan scribbled his lightning-fast formulas for π in a notebook, physicists are ...

New measurements using gravitational lensing suggest the universe’s current expansion rate does not agree with signals from the early cosmos.

Three thought experiments involving “demons” have haunted physics for centuries. What should we make of them today?

From a particle smasher encircling the moon to an “impossible” laser, five scientists reveal the experiments they would run ...

Galaxy clusters are the most massive objects in the universe held together by gravity, containing up to several thousand ...

Astronomers are a step closer to cracking one of the secrets of dark energy—the mysterious force believed to be causing the universe's accelerated expansion.

This investigation examines the multiverse theory, exploring whether parallel universes could truly exist. Scientists weigh the evidence, from quantum mechanics to cosmic ...