[RightWhale]

The stories of the astronauts on the space station "seeing" cosmic rays in the darkness

Reports are they can be seen inside the eyeball. Kind of a bubble chamber, a flash of light inside the eye when it is completely dark.

[sleavelessinseattle]

One chap even tried holding a lead battery next to his head between him and the sun(source of the solar flare that was bombarding the ISS with Xrays). No success, though. I'd rather NOT have my melon allow me to become a direct observer of nuclear particle reactions...Lets leave that to CERN!