2026 Nobel Prize: Who is Francis Halzen and what is the IceCube Observatory?

The 2026 Nobel Prize in Physics was awarded to Francis Halzen on Tuesday for his contributions to the IceCube Neutrino Observatory and the discovery of high-energy neutrinos from astrophysical sources.

According to the National Academy of Sciences, Francis Halzen is a Vilas Research Professor and Gregory Breit Distinguished Professor of Physics at the University of Wisconsin–Madison. He completed his Master’s and PhD degrees from the KU-Leuven, Belgium.

Halzen is the recipient of numerous awards, including the 2014 Smithsonian American Ingenuity Award, the 2015 Balzan Prize, a 2018 Bruno Pontecorvo Prize, the 2019 IUPAP Yodh Prize, the 2021 Bruno Rossi Prize, the 2021 Homi Bhabha Award, and honorary doctorates at several universities.


Read more: Nobel Prize in Physics 2026 awarded to Francis Halzen for work on ghost-like cosmic messengers

The 2026 Nobel Prize was awarded to Halzen for his role as the principal investigator of IceCube, a cubic-kilometer neutrino telescope buried in the Antarctic ice at the South Pole.

Neutrinos are often described as ghost-like particles because they can travel through space without changing direction or losing energy.

Their detection can help scientists study some of the most violent environments in the cosmos.

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IceCube’s first observations of high-energy cosmic neutrinos garnered the 2013 Physics World Breakthrough of the Year Award.

IceCube provided in September 2017, the first evidence of a source of high-energy cosmic rays, whose origins have been exceedingly difficult to trace since they were discovered over one hundred years ago, the National Academy of Sciences said.

The Nobel Prize in Physics is awarded by the Nobel Assembly at Karolinska Institutet in Stockholm, Sweden. The prize money this year is 12 million Swedish kronor (about $1.2 million).

The prize has been awarded 119 times since 1901, with 230 laureates receiving the prize through 2025. The 2026 award takes the total number of Physics Nobel prizes to 120.

The first person to receive the Nobel Prize in Physics was Wilhelm Conrad Röntgen for discovering X-rays. The youngest person to receive the award was Sir William Lawrence Bragg who won the achievement along with his father William Henry Bragg for their services in the analysis of crystal structure by means of X-rays, while the oldest recipient was Arthur Ashkin, who was 96 at the time of award, for the invention of optical tweezers.

Last year, three people won the Nobel Prize in Physics—John Clarke, Michel H Devoret and John M Martinis for the discovery of macroscopic quantum mechanical tunnelling and energy quantisation in an electric circuit.