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.

For experimental physicists, the latest measurement of the muon is the best of times. For theorists there's still work to do.

The supercollider is now being used to explore quantum phenomena, including a “magic” form of quantum entanglement.

At the turn of the century, it sounded as if string theory could give us big answers about the universe. Well… has it?

In 1887, one of the most important experiments in the history of physics took place. American scientists Michelson and Morley ...

The speed of light has been one of science’s most trusted markers of stability. For more than a century, the idea that light ...

A recent experiment at Fermilab has delivered intriguing results that challenge standard predictions, adding fuel to the ...

Kellogg Stelle was a professor of physics at Imperial College London for decades until his death last month. In 1977, he developed a particle theory of gravity that’s renormalizable, but the theory’s ...

Several leading quantum gravity theories predict that there is a dependence of the speed of light on photon energy, which would bridge incompatibilities between general relativity and quantum physics.

A new discovery suggests gravitational fields can enable matter to become quantum entangled — and that's even if the concept ...

Traci Brimhall is the 2025 poet in residence at the Guggenheim New York, in collaboration with the Academy of American Poets.