I think they do, and while I don't want to say that no one on Earth has ever seen an alien (or a UFO, or whatever), I think a lot of people havebeen tricked by their minds, or have jumped to conclusions, as both Zucas and Mafoo point out. Our minds are quite powerful, and I doubt we understand what it might be capable of.
But I think there is definitely extraterrestrial life out there, statistically, it would be silly to think otherwise.







