I'm sure there are other life forms out there, but they are likely either behind us technologically or so advanced that we would be just like ants to them.
I don't believe in aliens. I would if I see any evidence that these fellas really do exist. I wonder if they really look the same to the ones we see on movies.
For me, I believe anything is possible. The truth of the matter is that there is still so much we do not know, so much we have not been able to explore. It's very possible there could be some intelligent lifeform out there.
