​​The world's first neutrino observation in a hydrogen bubble | The Nobel Prize

​​The world's first neutrino observation in a hydrogen bubble chamber took place on this day, 13 November 1970.

Bubble chambers were invented by Nobel Laureate Luis Alvarez and could be used to track high energy particles. The chamber was filled with superheated liquid, just above the normal boiling point. If a charged high-energy particle passed through, the liquid started to boil along its path, producing a trail of tiny bubbles which could be photographed.