I was with my dad once chatting to an old couple who used to live in my folks house. They told about a time when an UFO floated around this rural road sucking up the roof tiles from the houses and dumping them down. The old duffer showed us a picture he had taken of the house and roof. The Tiles had been lifted straight up and dumped down again. No storm could have done that, and this was a respectable church going couple with no whackiness about them at all.
UFO - un identified flying object? Well, everything you see flying that you do not know what it is is a UFO. But who is piloting them? I haven't seen an alien personally, but do they exist?
My thoughts are that you would have to be galatically stupid to think that in a universe so big that the human mind can not even begin to comprehend it's size, that there is on other planets out there. Either stupid, arrogant or religious. Or a mix of the three.