Physicists have demonstrated with unprecedented accuracy that the speed of light remains constant. In 1887, a landmark physics experiment was carried out by American researchers Michelson and Morley.

Physicists have chased a unified description of nature for more than a century, yet quantum theory and gravity have ...

Dark matter, the invisible glue that outweighs normal matter in the cosmos, is starting to look less like a passive backdrop ...

The two stars in the nearby system ZTF J2130 are spiraling toward a catastrophic supernova. In the meantime, scientists are ...