Tom Petty’s famous song applies to all of us, because of Einstein’s equivalence principle of gravity in free fall.

Add Yahoo as a preferred source to see more of our stories on Google. A new interferometer directly measured the quantum phase of free fall, matching a prediction tied to Einstein's equivalence ...

Add Yahoo as a preferred source to see more of our stories on Google. For the first time, physicists have measured the tiny quantum shift an object acquires by falling through Earth's gravity — an ...

Physicists have directly observed a long-predicted quantum effect of gravity, putting one of Einstein’s foundational ideas to a striking new test. Using ultracold atoms, researchers split an atom’s ...