Some of the replies here is hilarious, it really is. The sheer arrogance of little insects and creatures barely out of the primordial ooze thumping bony chests pretending we're special enough to be the only life existing in a universe, whose size, despite our best efforts we'd never understand. Once we've mapped the entire universe and searched each and last corner of the place, only then would you be allowed to make such outlandish claims. We're protozoa living and crawling over a grain of sand on a mighty beach. For the very distant future we're confined to this grain of sand so open your minds and let the wonder it.