The IceCube Laboratory

French President Francois Hollande looks at a coffin as he attends a national tribute at Paris Prefecture for the three officers killed during last week's attacks by Islamic militants, Jan. 13, 2015.

IceCube used icebreakers to deliver heavy equipment from Sweden to the coast of Antarctica. (Chadden Hunter)

Scientists began deploying neutrino detectors beneath 1,500 meters of ice starting in November of 1992. (Robert Morse/NSF)

Once the detectors were deployed, cables were pulled to connect the sensors to IceCube Lab’s servers. (Freija Descamps/NSF)

A technician at the University of Wisconsin-Madison Physical Sciences Lab works on one of the sensors of the IceCube detector. (IceCube/NSF)

NSF scientists, engineers and drillers working on the deployment of IceCube in Dec. 2010, signed the last sensor before it was buried 2 kilometers deep in the Antarctic ice. (IceCube/NSF)

Members of the IceCube Collaboration before the deployment of the last digital optical module (DOM), installed on Dec. 18, 2010. (Robert Schwarz, NSF)

This digital image shows the highest energy neutrino ever observed, with an estimated energy of 1.14 petaelectronvolts (PeV), detected by the IceCube Neutrino Observatory at the South Pole on Jan. 3, 2012. (IceCube Collaboration)

Only two percent of Antarctica is not covered in ice. (Jim Haugen/NSF)

The IceCube Lab under the stars. (Felipe Pedreros. IceCube/NSF)