Astronomers have revealed details of mysterious signals emanating from a distant galaxy captured by a telescope in Canada. The exact nature and origin of the radio waves are unknown, the BBC writes. Among the 13 fast radio bursts, there was also a very unusual repeating signal, coming from the same source at a distance of about 1.5 billion light-years. Such an event was reported only once before by another telescope. Ingrid Stears, an astrophysicist at the University of British Columbia, says, “Knowing that there was such a thing before, we supposed there were such things somewhere. With more repeaters and more...