Where did the ‘Oh-My-God’ particle come from?
Our planet is under a constant bombardment of radiation—from space. Well, maybe it’s not as scary as that makes it seem. “Radiation” is a catchall term astronomers use for forms of light—including visible light, the kind we see—and also for subatomic particles sleeting through space. We don’t normally think of such particles as “rays”—cosmic rays,…
