In 2001, a radio telescope detected a very short and strange signal. It seems to come from a very distant galaxy. It was the first ‘Fast Radio Burst’ (FRB) observed, a mysterious signal that can teach us invaluable information about the content of the Universe. FRBs have been often in the news all around the world, although the information reported by the press has often been misleading. In this video we follow the scientific method to dig into the FRB enigma.