Scientists have found a new way to create a controlled beam of muonium, an exotic atom containing a heavier cousin of the electron. The advance could allow researchers to test for the first time ...

Somewhere between the microscopic realm of elementary particles and the macroscopic world of human beings, something strange ...

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

A new experiment found that a falling quantum wave behaves just as Einstein’s equivalence principle predicts. The result ...

Does gravity act equally on all particles in the universe, or are there differences between ordinary and exotic matter?

Physicists have directly observed a long-predicted quantum effect of gravity, putting one of Einstein’s foundational ideas to ...

Physicists have proven a 100-year-old prediction of relativity by showing that Einstein's equivalence principle holds at quantum scales.

TEMECULA, Calif., March 29, 2021 (GLOBE NEWSWIRE) -- Over 400 years ago, Galileo changed the world by proving that the earth orbits the sun. This discovery not only paved the way towards a reveal of ...

Just over a week ago, European physicists announced they had measured the strength of gravity on the smallest scale ever. In a clever tabletop experiment, researchers at Leiden University in the ...

If you want to understand gravity, it makes sense to study black holes. Nowhere else can you find so much gravity so conveniently compacted into such a relatively small space. In a way, in fact, black ...

In the 1950s and earlier, the gravity theory of Einstein's general relativity was largely a theoretical science. In a new paper published in EPJ H, Jim Peebles, a physicist and theoretical cosmologist ...