I believe there are definitely aliens, if by alien you mean life-form. Perhaps even some in our solar system.
I believe there may be other intelligent lifeforms, but given the vastness of space-time, I doubt we will ever know them from our travels or theirs. If they do exist, it would be an incredible coincidence for them to exist at the same time as us and be close enough to us to bother visiting for reasons other than colonization I figure.
One idea I rather like tho is that humans ARE aliens, deported from our home planet for crimes against alienanity, and left here. Earth is sort of an alien prison colony. This wouldn't explain the links to us through evolution, but would explain how so many of us find it easy to be jerks I don't really believe that tho, I just find the notion quite amusing.
I believe there may be other intelligent lifeforms, but given the vastness of space-time, I doubt we will ever know them from our travels or theirs. If they do exist, it would be an incredible coincidence for them to exist at the same time as us and be close enough to us to bother visiting for reasons other than colonization I figure.
One idea I rather like tho is that humans ARE aliens, deported from our home planet for crimes against alienanity, and left here. Earth is sort of an alien prison colony. This wouldn't explain the links to us through evolution, but would explain how so many of us find it easy to be jerks I don't really believe that tho, I just find the notion quite amusing.