https://www.youtube.com/watch?v=rniGXy-jtg0 - Wow! signal - - Long far and ago away, a duo of dancing supermassive black holes look like spiraling in towards the other person, eventually doomed to collide in a stupendous, almost unimaginable, cosmic smash-up. Dancing at night, the strange pair will merge only a million years from now, liberating energy comparable to 100 million supernova blasts, in which massive stars perish. If not all, large galaxies in the Universe--including our own Milky Way--contain supermassive black holes with masses equivalent to millions, or even billions, of Suns, and these objects of incredible darkness and their host galaxies appear to evolve together, or "co-evolve", the dark-hearts of most. Theory predicts that as galaxies collide and eventually merge, growing more and more massive because of this, so too do their hearts of darkness. In the January 7, 2015 issue in the journal Nature, a team of astronomers report over a weird repeating light signal from a distant quasar that they say is probably the result of a duo of dancing supermassive black holes during the last act of the merger--something that is predicted from theory but that has never been seen before! A quasar is definitely a brilliant, luminous object that out-dazzles all of the stars in its host galaxy combined, and it is visible from across the entire Universe!