text: is alien is an intelligent ? is alien is an intelligent creature why human afraid of them perhaps we can learn something from them. "alien" means "someone not of this place". "extraterrestrial" means "a living organism that inhabits a planet besides earth".   an alien, or an extraterrestrial, does not have to be intelligent. if we found bugs on a different planet, they would still be aliens and not be intelligent. and if we do find sentient (latin, "intelligent") bioforms in the universe besides ourselves, we should make peace and not be afraid.