The speed of light remains one of physics’ firmest assumptions, but scientists still test whether it ever shifts under ...

Flashes of femtosecond laser light, lasting just a few trillionths of a second, have made it possible to observe new magnetic ...

If the speed of light were much slower, a lot of very odd effects, from redshift to time dilation, would be a lot more ...

Light's behavior seems counterintuitive. That is, until you figure out light is a wave. The way light behaves can seem very counterintuitive, and many physicists would agree with that, but once you ...

First sight?: CERN's ATLAS collaboration claims to see light-by-light scattering for first time The idea that particles of light can interact with one another – known as light-by-light scattering – ...

Editor’s Note: Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. The 2023 Nobel Prize in physics has been ...