By examining the resulting charge and light produced in this collision, scientists can determine whether dark matter was involved.

CNN: How particle smasher and telescopes relate

And when such a collision does occur, the pattern of light produced gives away not only the type of neutrino, but the direction it was travelling in.

ECONOMIST: Neutrinos

If all we do is change our light bulbs to compact fluorescents, we will face a catastrophic collision with reality.

FORBES: Alex Steffen