Francis Halzen Wins the 2026 Nobel Prize in Physics for the IceCube Neutrino Observatory
Belgian-born physicist Francis Halzen of the University of Wisconsin-Madison won the 2026 Nobel Prize in Physics, announced by the Royal Swedish Academy of Sciences on 6 October 2026, "for decisive contributions to the IceCube Neutrino Observatory and the discovery of high-energy neutrinos of astrophysical origin", with a prize of 12 million Swedish kronor. Halzen proposed detecting neutrinos in Antarctic ice in 1988. The cubic-kilometre detector at the South Pole, built from light sensors frozen deep into glacial ice, began operating in 2010, was completed in 2011 and recorded the first high-energy extraterrestrial neutrinos in 2013, opening the field of neutrino astronomy.
Neutrinos are nearly massless, electrically neutral leptons that interact only via the weak force, making them extremely hard to detect | India's own effort is the India-based Neutrino Observatory (INO), proposed at Bodi West Hills in Theni district, Tamil Nadu | The 2015 Physics Nobel went to Takaaki Kajita and Arthur McDonald for discovering neutrino oscillations, which proved neutrinos have mass