Worldwide Neutrino Web: Exhibition Science Bringing Nations Together

The idea of an invisible particle that carries off energy was intro-duced by Wolfgang Pauli in 1930. The term "neutrino" ("little neutral one") was suggested by Enrico Fermi in his 1934 theory of beta-radioactivity which explained how a weak nuclear force could make atomic nuclei unstable. The neutrino, Fermi said, had no mass at all. But the neutrino does interact, slightly, and its importance has grown under the watchful eyes of experimenters and theorists.