The IceCube Neutrino Observatory at the South Pole. Photo: Christopher Michel / Wikimedia Commons, CC BY-SA 4.0 (cropped)
The 2026 Nobel Prize in Physics has been awarded to Francis Halzen of the University of Wisconsin–Madison, the principal investigator of the IceCube Neutrino Observatory at the South Pole. The prize was announced on 6 October 2026.
Key facts
The Nobel committee honored his "decisive contributions to the IceCube Neutrino Observatory and the discovery of high-energy neutrinos of astrophysical origin."
IceCube uses thousands of light sensors embedded in a cubic kilometer of Antarctic ice, about a mile below the surface.
In 2013 it made the first detection of high-energy neutrinos from beyond our solar system, and it has since traced them to sources including a distant active galaxy and our own Milky Way.
The IceCube collaboration brings together about 450 scientists from 58 institutions in 14 countries.
Why it matters
Neutrinos pass through almost everything, which makes them incredibly hard to catch, but it also means they can carry news from the most violent places in the universe. IceCube gave astronomers a whole new way to look at the cosmos, and it was built through decades of patient international teamwork.
Worth noting
The prize will be presented in Stockholm on 10 December. IceCube is led by the University of Wisconsin–Madison and supported by the U.S. National Science Foundation.