Nobel winner Francis Halzen said the prize 'was not a motivation,' speaking of his IceCube observatory, which uses Antarctic ice to track 'ghost particles' called neutrinos ▻ ↧ Francis Halzen wins Nobel physics prize for Antarctic 'ghost partic... The Belgian-American scientist Francis Halzen won the 2026 Nobel Prize in Physics for his work creating an Antarctic observatory of ice to detect high-energy neutrinos, elusive subatomic particles that can reveal otherwise inaccessible information about the cosmos.