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

Learn how a particle born in the sun’s core left a measurable flash of light two kilometers beneath Earth’s surface.

Brian Cox explains the most extreme, dangerous region in the cosmos, where gravity, radiation, and physics push the limits of ...

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 ...

Current physics is speeding toward a breaking point, as astronomers confirm that the Hubble tension in new data.

In the heart of a distant spiral galaxy, a cosmic storm has erupted. This event is unlike anything astronomers have seen ...

The exploration of quantum information challenges objective reality, positing the universe as a hologram is explored through ...

If you look across space with a telescope, you’ll see countless galaxies, most of which host large central black holes, billions of stars and their attendant planets. The universe teems with huge, ...

"This observation also demonstrates that we can use Webb to find individual stars when the universe was only 5% of its ...

Aliens might be transmitting communications signals to each other across exoplanets, some astronomers think. Since these ...