In UFOlogy, Nordic aliens are claimed to be a group of humanoidextraterrestrials purported to come from the Pleiades who resemble Nordic-Scandinavians. Professed contactees describe them as typically male, six to seven feet tall (about two meters) with long blonde hair, blue eyes, and skin tones ranging from fair to tanned. UFOlogist George Adamski is credited with being among the first to claim contact with Nordic aliens in the mid 1950s, and scholars note the mythology of extraterrestrial visitation from beings with features described as Aryan often include claims of telepathy, benevolence, and physical beauty.
Cultural historian David J. Skal wrote that early stories of Nordic-type aliens may have been partially inspired by the 1951 film The Day the Earth Stood Still, in which an extraterrestrial arrives on Earth to warn humanity about the dangers of atomic weapons.Bates College professor Stephanie Kelley-Romano described alien abduction beliefs as "a living myth", and notes that, among believers, Nordic aliens "are often associated with spiritual growth and love and act as protectors for the experiencers."
In contactee and UFOlogy literature, Nordic aliens are often described as benevolent or even "magical" beings who want to observe and communicate with humans and are concerned about the Earth's environment or prospects for world peace. Believers also ascribe telepathic powers to Nordic aliens, and describe them as "paternal, watchful, smiling, affectionate, youthful, [and] all-knowing." Kelley-Romano observes that "white extraterrestrials are those that are most revered" among claimants, compared to other beings like the greys, and argues that claimants may use their stories about extraterrestrials "as a means of articulating racially based fears".
During the 1950s, many contactees, especially those in Europe, claimed encounters with beings fitting this description. Such claims became relatively less common in subsequent decades, as the grey alien supplanted the Nordic in most alleged accounts of extraterrestrial encounters.
In the episode "Aliens Among Us" of the TV show "Scooby-Doo! Mystery Incorporated", a blonde Nordic alien was the disguise of Shiela O'Flaherty, a wanted thief. She and two others disguised themselves as aliens, including a Grey and a Reptilian.
In the video-game "Perfect Dark", the antagonistic Skedar aliens disguise themselves as Nordic aliens to trick humanity into submission.
In the shooter video-game "ALIENGINE" by the Hong Kong indie game development studio FIGHT4DREAM, the player can choose a Nordic alien (among other alien races such as Greys, Reptilians, and Mothmen) as their character. Their spaceship shoots asteroids and dodges enemy ships and monsters in order to be qualified for the title of "number one pilot in the universe".