In this handout photo provided by 'Bergamo Scienza 2026', physicist Francis Halzen speaks during a presentation on the IceCube Neutrino Observatory at the BergamoScienza science festival in Bergamo, Italy, Sunday, Oct. 4, 2026. Halzen was awarded the Nobel Prize in Physics on Tuesday, Oct. 6, for his contributions to the IceCube Neutrino Observatory and the discovery of high-energy neutrinos of astrophysical origin. (Laura Pietra/Bergamo Scienza 2026 via AP)