There is theory that primitive life forms may exist on one of Jupiter's moons, but I can not believe that bacteria could build a sophisticated flying machine and keep it hidden from our view as we explore space!I believe that the UFOs are made by our government, and that the true conspiracy is, as always, the government lying to us! If they make us believe they are covering up aliens and UFOs, they while we're all out on a wild goose chase, they can do unimaginable things that we will never uncover!I don't doubt that there is life beyond our solar system.The Roswell UFO Incident involved
