Greys are mysterious extraterrestrial species that have reported by many people who claimed they have been abducted in the past by aliens. They appear human like with smoshed noses, large or small heads, no ears and small bodies. Nothing more is really known except they travel around in U.F.O.'s. Their communication is different from humans and they speak in an unknown language that humans cannot understand. They seem to be very advance species of intelligent life forms.