The constancy of the speed of light is a pillar of modern physics, but questions persist about its absolute universality.

Why does lead behave so differently from every other atomic nucleus when struck by electrons? A team of physicists at ...

Physicists got their first look at the structure of the atomic nucleus. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The Geiger-Marsden ...

A new measurement of the strong nuclear force, which binds protons and neutrons together, confirms previous hints of an uncomfortable truth: We still don’t have a solid theoretical grasp of even the ...

Neutrinos are tiny subatomic particles that barely interact with matter. They can pass through planets without stopping. The ...

THE theory of atomic structure has, during the past few years, reached a stage of sufficient success and stability for it to be possible to describe many of its features in a simple manner. There is a ...

According to Einstein the speed of light is always the same. But according to theoretical models of quantum gravitation, this uniformity of space-time does not apply to particles. Physicists have now ...