This is one of those things that truly illustrates our own insignificance. I believe that it is immensely arrogant and profoundly ignorant to assume that we are the only living thing in billions of galaxies, each with billions of stars many with similar planets to our own. In many ways it is still equally as arrogant to assume that if there was intelligent life ( which undoubtably there is) that it would waste a single second of its time attempting to contact our largely greedy and violent race. I would like to think we are not alone in this universe because if we, the human race were the only and or most intelligent life form in it, that would honestly be a very sad thing indeed.