In Antarctica, UW-Madison researchers answer questions about the hidden giants of our universe

“When the neutrino interacts in the ice, it shatters an atom and the splinters from that direction are a lot of energetic subatomic particles,” UW-Madison professor of physics and astronomy — and frequent IceCube collaborator — Justin Vandenbroucke said. “A fraction of those have electric charge, and they make a flash of blue light.”