The Parkes radio telescope located four brief but powerful bursts of energy from other galaxies. In this image, the telescope is superimposed on an image of the gas in the Milky Way. (Swinburne Astronomy Productions, vr.swin.edu.au) A team of international astronomers has detected four explosive events, known as fast radio bursts (FRBs), above the plane of our Milky Way Galaxy. Lasting only a few thousandths of a second, these sources send powerful signals across the universe, traveling billions of light-years...