The 2026 Nobel Prize in Physics recognised work on which observatory, built into the ice at the South Pole?

Explanation

1. 01

   Francis Halzen won for IceCube, a cubic kilometre of ice fitted with light sensors, and the discovery of high-energy neutrinos from space.

2. 02

   Super-Kamiokande is a neutrino detector in Japan; LIGO detects gravitational waves.