Add Yahoo as a preferred source to see more of our stories on Google. Our planet is under a constant bombardment of radiation—from space. Well, maybe it’s not as scary as that makes it seem.

FARGO - For years, physicists were working to build a "very complicated puzzle" but couldn't quite find the one missing piece in the box, North Dakota State University assistant professor of physics ...

A single subatomic particle from deep space had the same energy as a baseball pitch, and scientists still don’t know how it got here ...