Person
Belgium-born physicist and professor at the University of Wisconsin–Madison, principal investigator of the IceCube Neutrino Observatory.
Francis Halzen won the 2026 physics Nobel for IceCube's discovery of high-energy neutrinos of astrophysical origin. A Conversation essay uses the award to review how scientists have used Antarctica as a stand-in for other worlds and as a place to look out from.
Reality
Peter Hegemann, Georg Nagel and Karl Deisseroth won this year's medicine Nobel for optogenetics, which uses light to switch on chosen neurons. With it, researchers can switch on one circuit and see whether a behavior follows, a direct test of cause.
Reality
Francis Halzen, who leads the IceCube observatory at the South Pole, won the 2026 physics Nobel for detecting high-energy neutrinos from astrophysical sources. The committee's citation names the observatory alongside the discovery, so the instrument in the Antarctic ice is part of what the prize honours.
Perspective Coverage
19 publishersReality
Francis Halzen won the 2026 physics Nobel for IceCube, a cubic kilometre of South Pole ice that caught neutrinos from beyond the solar system. Earlier neutrino prizes stopped at the Sun. This one rewards pointing the particle at the wider sky.
Reality
Nobel physics laureate Francis Halzen said he proposed neural nets for physics data in 1991 and credits them with finally showing IceCube the Milky Way. His account links an idea he says took decades to mature to one of the Antarctic detector's best-known results.
Reality