Charlie-
You can't forget about the bats... all the damn bats!
For the original post- UFO's... sure, why not. It's a big universe out there and I would think we would have to be a pretty narrow minded, narcissistic people if we didn't believe that there is something or someone else somewhere. With infinite space going out in all directions, it seems to me, there has got to be more to it than what we have experienced thus far.
$0.02
Mike