if you believe the rustel in the grass is just the wind and turns out it's a dangerous predator, you're lunch. you have been taken out of the gene pool by a predator. we're the descendants of those most likely to believe everything is real, just in case it is. our brains are like lawyers. marshalling the evidence to support the case, that is your belief. once you form the belief, astrology is real i think everything happens for a reason, whatever it is. you find the evidence to fit it and ignore the evidence that doesn't fit it. john: so people believe in things like ghosts and global warming, but aliens? a harris poll says about a third of americans believe in ufos. >> you think there are aliens? >> yes. >> aliens? yes, definitely. >> absolutely yes. >> yes, i do. >> 100%. john: i mean what's that about? >> so what's going on here is that aliens are sort of like gods or deities or something bigger than us and we know from psychological research that people naturally think that everything happens for a reason, that the way things unfold in life are designed that there's something out th