I'm not sure. Someone that says there definitely is - or is not - other life is probably a bit closed minded. In truth, we know very, very little about our own existence, what exactly life is, and the universe around us - especially that which is outside the Earth's atmosphere.
Personally, I think that we may be in fact living on the equivelant of an "electron" orbiting around a "nucleus" of an "atom" which is part of an incomprehensibly large living creature of which we are a part. This enormous life could be called extra-terestrial and could even be God of which we are both seperate and a part. But I digress and this is something we can't possibly understand.
I believe there is, beyond what we know on earth, God and life of the heavens and possibly little green men too. But I don't think badly of someone who feels there are some or none of these things.
