The Gargamelle collaboration at the European laboratory CERN began operating its bubble chamber in the early 1970s, shooting neutrinos through 12,000 liters of Freon, a heavy liquid.
Imagine a house-sized acrylic fishbowl inside a giant, shiny, disco-ball-like sphere, suspended in a cavern as tall as a 10-story building. Now imagine climbing around inside that pitch-dark fishbowl with a squeegee and a flashlight.
