This was
your sky.

Ice Fishing for Cosmic Neutrinos

Scientists are melting holes in the bottom of the world, near the South Pole, for astronomical observatories. Astronomers with the Antarctic Muon and Neutrino Detector Array (AMANDA) lower strings of basketball-sized light detectors into each vertical lake. The water in each hole soon refreezes, encasing the detectors. The detectors are sensitive to blue light emitted in the surrounding clear ice, which is expected from ice collisions involving cosmic neutrinos.