I posed this question before. What if we are we are the only ones? What if we are the first and only intelligent species?
With that in mind here are a few articles that deal with the subject of aliens from space.
'Popular Mechanics.com'. "Perhaps we're looking too far back in time through WISE, and alien civilizations have advanced since then. Two, the civilizations out there are about on par with humanity, and no more advanced. Three, there really is a "Great Filter" and civilizations destroy themselves before they become interstellar. Or maybe there's just nothing out there."
Search for Advanced Civilizations Finds Nothing Obvious
5 Insane Theories About Why We Haven't Discovered Alien Life
10 Reasons That We Still Haven’t Found Aliens
Just what if we're nothing more then artificial intelligence in much the same way as we create such robotic software replicating ourselves to our current level of available technology?
One day our computer programs may question who and what they are, never to know who their creators were (given it was never a part of their programming) for fear they might supersede those who created them.
Something to think about, eh?