Superfluid helium has produced a narrow muonium beam, opening a path to test whether exotic particles fall like ordinary ...

(Phys.org) —Einstein's equivalence principle states that an object in gravitational free fall is physically equivalent to an object that is accelerating with the same amount of force in the absence of ...

Gravity is the OG of the forces of Nature. Historically it was the first to be discovered and described scientifically, yet it’s the most challenging to study. Even though gravity governs the orbits ...

The weak equivalence principle (WEP) is central to Einstein's general relativity. It posits that gravity must accelerate ...

Learn about a recent experiment that could take us one step closer to solving one of physics biggest questions.

(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.) Evangeline Rose, University of Maryland, Baltimore County; Kevin E. Omland, University ...