Using the giant Virgo interferometer in Tuscany, researchers are recording gravitational waves created by interstellar cataclysms as they wash through our planet.
The IceCube observatory has detected neutrinos from an active galaxy for the first time, revealing clues about how supermassive black holes gobble matter.
These international projects, selected during the process to plan the future of US particle physics, are all set to come online within the next 10 years.