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

Physicists have put a decades-old idea about why the strange rules of quantum mechanics disappear in our everyday world to one of its toughest experimental tests yet. Deep beneath Italy’s Gran Sasso ...

After a decade of work, scientists at the National Institute of Standards and Technology (NIST) have revealed a new measurement of big G, the number that defines the strength of gravity. The result ...

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 ...

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

A decade-long NIST experiment has produced a new measurement of the universal gravitational constant that differs ...

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 ...

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

Does gravity act equally on all particles in the universe, or are there differences between ordinary and exotic matter? Physics professor Anna Soter and her team at ETH Zurich and the Paul Scherrer ...

An Einsteinian view of gravity, a curvature in spacetime caused by mass and energy. (ESA/C.Carreau) Quantum mechanics and Einstein's general relativity explain how the Universe works at the tiniest ...

For more than a century, quantum mechanics and Albert Einstein’s theory of general relativity have each passed countless tests, but physicists have struggled to reconcile the two. Now, scientists in ...