A new telescope has detected 'hundreds' of mysterious radio bursts from space, prompting a string of theories about where they're coming from that run from the mundane to the astonishing. Fast Radio Bursts (FRBs) are very short but very intense pulses of radio waves which were first discovered in 2007. Lasting as little as a fraction of a millisecond, they are thought to travel to Earth from other galaxies far out in the universe, and could be coming from other civilisations, according to Harvar