Add Yahoo as a preferred source to see more of our stories on Google. Scientists imagine virtual particles popping in and out of existence to explain how forces transfer between particles.

Add Yahoo as a preferred source to see more of our stories on Google. A clever mathematical tool known as virtual particles unlocks the strange and mysterious inner workings of subatomic particles.

Stress is a very real factor in the structure of our universe. Not the kind of stress that students experience when taking a test, but rather the physical stresses that affect everyday objects.