The Laboratoire souterrain de Modane (LSM) is an underground laboratory located in the middle of the Frejus road tunnel. With a surface area of 3,500 square meters, this laboratory, which was created in 1982, investigates very specific phenomena through international studies (measurement of stability, neutrinos, detection of dark matter in the universe). These studies are made with extremely low radioactivity. Inside the laboratory. (January, 2013)