Scientists detect a repeating signal from deep space, but its origin is a mystery

To begin, there's zero evidence it's aliens. But for just the second time, a team of astronomers detected a flash of repeating of radio waves emanating from beyond our Milky Way galaxy. Using a new, sprawling Canadian telescope dubbed CHIME — which is the size of six hockey rinks — scientists identified the short, repeating burst in the summer of 2018 and published their results Wednesday in the journalNature.   The source of these super distant signals, from some 1.5 billion li