The universe is infinite my friend. We hardly know what goes on in our own neck of the woods. Some stars have have other stars orbiting them! So it's not to far fetched to theories any thing until we know it all. So far we've counted over 1 quadrillion galaxies. But we can't even send a man to Mars. Yet alone the bottom of our oceans. [spoiler]1 quadrillion is so big a number you could count every grain of sand on all the world beaches and not reach it![/spoiler]