Below the waves of the Mediterranean, Europe's KM3NeT neutrino telescope is on a cosmic hunt. Towering strings of sensors stretch a kilometer down to the seafloor, arranged in a vast 3D grid.
Each array is built from vertical lines of basketball-sized glass spheres containing ultra-sensitive optical sensors. These lines rise from the seafloor like underwater skyscrapers, stretching a kilometer into the dark. More than 1,000 modules are already in place, with 6,000 planned by 2027.
Just incredible