Scientists imagine virtual particles popping in and out of existence to explain how forces transfer between particles. koto_feja/iStock via Getty Images A clever mathematical tool known as virtual ...

So one of the strangest concepts I've come across in physics is the quantum vacuum. Or rather the apparent affect that empty space isn't empty. That the explanation right now is "virtual particles" ...

Everything we see around us, from the ground beneath our feet to the most remote galaxies, is made of matter. For scientists, that has long posed a problem: According to physicists’ best current ...