"Greys" are a type of extraterrestrial being often depicted in popular culture and UFO lore. They are typically described as having small, slender bodies, large heads, and big black eyes. These characteristics have made them one of the most recognizable types of aliens in media, often associated with abduction stories and sightings. The concept of Greys gained popularity in the 20th century, particularly after the Roswell incident in 1947. Many people claim to have encountered them during alleged alien abductions, leading to various theories about their origins and intentions. Despite numerous reports, there is no scientific evidence to confirm their existence.