Video Catching some rays

The Incredible Hulk may have been created by gamma radiation, but David Banner could never get mad enough to catch gamma rays streaking to earth. A team of researchers at UW–Madison is building cameras that can see the arrival from space of these cosmic rays, marked by a cascade of subatomic particles created when gamma rays smash molecules in the atmosphere. The rays they detect can tell physicists new things about the cosmic events — like exploding stars, or even elusive dark matter — that produce them.

Video by Craig Wild/University Communications