That is a very good point Scath. They could be right here, right now, under our noses, and we wouldn't know any better. Maybe they can disguise themselves as anything. Maybe they can become invisible to the human eye. Or maybe some fauna or flora species on Earth are really from another planet. And then again, if there is other life on other planets, what's to say that they have intelligence? There can be a planet out there loaded with nothing but bacteria and paramecium and whatnot. I still do believe that there are other planets in the universe that have life thriving on them. It's just a matter of waiting to see if we get there first, or if they come here. But regardless of it all, we will find proof of other life. Then, and only then, will there be peace on Earth, as everyone ceases to see themselves as "caucasian", "Spanish", and "Jewish", and understands that we are all just human (or Earthling, if you prefer).