Belgian-American physicist Francis Halzen, aged 82, was named the recipient of the 2026 Nobel Prize in Physics on Tuesday in Stockholm. The award committee acknowledged Halzen for his significant contributions to the IceCube Neutrino Observatory and the identification of high-energy neutrinos from astrophysical sources. Situated at the Amundsen–Scott South Pole Station in Antarctica, the observatory was a groundbreaking initiative by Halzen, who recognized the potential of using ice at the South Pole to track neutrinos, mysterious particles known for their ability to traverse through the Earth and matter without any interaction.
Eva Olsson of the Royal Swedish Academy of Sciences described neutrinos as messengers providing insights from the cosmos, shedding light on processes in distant galaxies and the explosions of stars. The Nobel Prize in Physics, with a prize sum of 12 million Swedish crowns ($1.7 million Cdn), is awarded annually by the Royal Swedish Academy of Sciences.
The IceCube Neutrino Observatory, covering a cubic kilometer, commenced operations in 2011 after years of planning since the late 1980s. Halzen expressed his gratitude during a phone call at a news conference, highlighting the initial skepticism surrounding the project’s success. Affiliated with the University of Wisconsin–Madison, Halzen expressed surprise and delight at the announcement while attending a conference in Italy. In 2014, he was nicknamed “Neutrino Man” by the U.S.-based Smithsonian magazine, receiving an Ingenuity Award.
Neutrinos, minute cosmic particles present everywhere, play a crucial role in understanding the universe’s evolution. Halzen’s work has led to valuable insights, with Mark Pearce, the chair of the Nobel Committee for Physics, praising his scientific vision and perseverance in advancing astronomy.
Plans for an extension, IceCube-Gen2, covering eight cubic kilometers of ice, aim to enhance neutrino detection capabilities tenfold by 2033. Despite the current achievements, Halzen believes the true impact of his work is yet to be fully realized, emphasizing the ongoing exploration of astronomy.
Belgian Prime Minister Bart De Wever extended his congratulations to Halzen for his dedication to unraveling cosmic secrets through the study of neutrinos. The discovery of neutrino oscillations was previously recognized by the Swedish academy in 2015, with Canadian scientist Dr. Arthur McDonald sharing the Nobel physics prize that year.
The Nobel Prize in Chemistry will be announced on Wednesday, followed by the literature prize on Thursday and the peace prize on Friday. The economics prize will be revealed on October 12. Established by Alfred Nobel, the prizes are a tribute to individuals who have made significant contributions for the betterment of humanity. The laureates receive their awards on December 10, the anniversary of Alfred Nobel’s death.
