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

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

New series: short, bite-sized summaries of important scientific topics — this is the first episode. Chapters 0:00 The force ...

Now, scientists in Israel and abroad have taken a new step toward understanding how they interact by directly measuring how gravity changes a quantum object as it falls. The findings could eventually ...

Einstein’s theory of gravity may behave slightly differently across distances of billions of light-years, with gravity ...

Gravitational physics has become a truly experimental science as tests of the special and general theories of relativity reach new levels of precision Right on time When I was a first-term graduate ...

The weak-equivalence principle is integral to general relativity, so these test results offer yet more support for a core theory of our universe. In 1916, Albert Einstein dared to declare that Isaac ...

Einstein was right: artist's impression of a neutron-star merger. (Courtesy: NASA) Multimessenger observations of neutron stars have been used by astrophysicists in the US to put Einstein’s general ...

An Einsteinian view of gravity, a curvature in spacetime caused by mass and energy. (ESA/C.Carreau) Quantum mechanics and ...