I recieved a copy of Erich von Däniken's "Chariots Of The Gods" about 1970 as a gift. I was just a kid, but I was hooked and have been ever since. Probably why I have a bit of an aversion to organized religion now(but not spirituality). Although many religious writtings hint at E.T's. Many believe that religion came from our contact with aliens. Will the universe keep expanding forever, as many believe. Or will it expand, then contract and blow up all over again. Some believe this has and will happen for eternity, over and over again. Billions of galaxies, each with billions of stars. Worm holes. Black holes. Dark Matter. The more we know, the more we realize we don't know!
To flatly deny the existance of something other than ourselves just baffles me. I figure most who believe that are probably members of The Flat Earth Society.