I am sure aliens exist, aliens don't have to be intelligent just alien.... because bacteria might be able to grow and we can cross polinate our species into difererent places . elon musk is a legend, he should be made a statue on mars.
Exactly, there sure are aliens that we don't know of. Not necessarily resembling human shape or intelligence.
The universe is huge for us to explore. Not one human life can reach to our nearest galaxy with current technology.