Anyone that doesn't believe in life on other planets, is missing quite a few brain cells. Even if you believe that life started in tidepools and we crawled out of the swamps and eventually walked on two legs (why are there still apes on this planet if we descended from them), you would almost have to agree that with billions of planets out there, there could be life on them. Now take the fact that the universe is billions of years old, is it not possible that on another planet somewhere in the universe, an intelligent species evolved, or was created some time before our world was habitable, and these beings having millions-billions of years head start on us, could have the capacity to visit our world. I'm sure they're curious about us like we're curious about the dinosaurs, plus we're much more interesting because we have shit to blow things up and maybe cause a catastrophe in the universe. If you don't believe in extra-terrestials, you must be brain dead. Of course the powers that be, don't want you believing in such things, how dare we think there might be some being more intelligent than our leaders. Nope I've never seen one, although to be honest, on a two year sabbatical in the wilderness of Arizona, I saw quite a few U.F.O.s, remember what a UFO is: an unidentified flying object, I saw a few that did things that no known terrestial object could achieve.