THE PRIZE · THE SCIENCE · THE PEOPLE
2026 Nobel Prize in Physics
Francis Halzen, IceCube and a new window on the universe. Explore the evidence through eight histories and three interactive experiments.
Awarded to Francis Halzen on 6 October 2026. Official announcement ↗
READ THE ARGUMENT
Eight ways into an invisible world
Start with the award, or follow a scientific question. Each story connects primary sources to a measurement you can understand.
The 2026 Nobel Prize in Physics: making the universe observable through neutrinos
How does a detector buried in ice become a telescope?
02Francis Halzen and the collaboration that made ice into an observatory
What lies between proposing an observatory and making a scientific measurement?
03Five Nobel chapters, five different neutrino questions
Why can the same particle lead to several Nobel Prizes?
04Cowan and Reines: why two flashes were more convincing than one
How can a detector distinguish a rare interaction from ordinary radioactivity?
05SNO: how heavy water distinguished disappearance from a change of flavor
If an instrument sees too few neutrinos, is the source wrong—or the detector only sensitive to part of the flux?
06Super-Kamiokande: using the Earth as a baseline
Why would upward-going and downward-going events tell different stories?
07SN 1987A: a few events, three observatories, one stellar collapse
How can a small number of events tell us something about the interior of a distant star?
08IceCube in 2013: how a population challenged an atmospheric explanation
What makes a collection of bright events evidence for something beyond the atmosphere?
CHANGE A CONDITION
Build the evidence yourself
Three teaching models. Every displayed result comes from the experiment’s own generated record; these are not original collaboration data.
REACTOR · TIME
Find a pair in the noise
Acquire pulses. Change the coincidence window. Test the background with a shifted record.
Open LabWATER · GEOMETRY
Make a ring from light
Change a charged particle’s speed and direction. Trace photons onto a real geometric plane.
Open LabICE · INFERENCE
Reconstruct an unseen track
Generate sensor times and charges, hide the truth, then fit the direction from the record.
Open LabDIFFERENT PLACES · CONNECTED QUESTIONS
The world behind the discovery
A first reading route through selected milestones—not a complete history. A site’s country is not the full list of its contributors.
- 1956
Savannah River
Direct reactor antineutrino detection
- 1987
Kamiokande-II · IMB · Baksan
A supernova burst across three instruments
- 1998
Super-Kamiokande
Atmospheric flavor and travel distance
- 2002
SNO
Electron flavor and total active solar flux
- 2013
IceCube
Evidence for a high-energy cosmic population
- 2026
Nobel Prize · Francis Halzen
Recognition of a new observing window