Add Yahoo as a preferred source to see more of our stories on Google. UPDATED: There's a massive gravitational wave announcement on the way Too much cosmic radiation can sterilize a planet – but a ...

Cosmic rays are particles from outer space that travel across the universe. They can be made by the sun, by other stars exploding, and even black holes. They move extremely fast, nearly the speed of ...

Scientists from the Telescope Array Collaboration have detected an ultrahigh-energy cosmic ray, a discovery that’s challenging our current understanding of exotic cosmic phenomena and their origins.