Alien visitation is the idea that intelligent extraterrestrial beings have visited Earth. Claimed forms of such visitations include;
In popular culture and UFO conspiracy theories, men in black (MIB) are government agents dressed in black suits, who question, interrogate, harass, threaten, allegedly memory-wipe or sometimes even assassinate unidentified flying object (UFO) witnesses to keep them silent about what they have seen. The term is also frequently used to describe mysterious men working for unknown organizations, as well as various branches of government allegedly tasked with protecting secrets or performing other strange activities.
Erich Anton Paul von Däniken is a Swiss author of several books which make claims about extraterrestrial influences on early human culture, including the best-selling Chariots of the Gods?, published in 1968. Von Däniken is one of the main figures responsible for popularizing the "paleo-contact" and ancient astronauts hypotheses.
George Adamski was a Polish-American author who became widely known in ufology circles, and to some degree in popular culture, after he displayed numerous photographs in the 1940s and 1950s that he said were of alien spacecraft, claimed to have met with friendly Nordic alien Space Brothers, and claimed to have taken flights with them to the Moon and other planets.
Grey aliens, also referred to as Zeta Reticulans, Roswell Greys or Grays, are purported extraterrestrial beings. They are frequent subjects of close encounters and alien abduction claims. The details of such claims vary widely. However, Greys are typically described as being human-like with small bodies, smooth, grey-colored skin; enlarged, hairless heads; and large, black eyes. The Barney and Betty Hill abduction claim, which purportedly took place in New Hampshire in 1961, popularized Grey aliens. Precursor figures have been described in science fiction and similar descriptions appeared in early accounts of the 1948 Aztec UFO hoax and later accounts of the 1947 Roswell UFO incident.
The extraterrestrial hypothesis (ETH) proposes that some unidentified flying objects (UFOs) are best explained as being physical spacecraft occupied by extraterrestrial intelligence or non-human aliens, or non-occupied alien probes from other planets visiting Earth.
Alien abduction refers to the phenomenon of people reporting what they believe to be the real experience of being kidnapped by extraterrestrial beings and subjected to physical and psychological experimentation. People claiming to have been abducted are usually called "abductees" or "experiencers". Most scientists and mental health professionals explain these experiences by factors such as suggestibility, sleep paralysis, deception, and psychopathology. Skeptic Robert Sheaffer sees similarity between some of the aliens described by abductees and those depicted in science fiction films, in particular Invaders From Mars (1953).
Elliot Budd Hopkins was an American artist, author, and ufologist. He was a prominent figure in alien abduction phenomena and related UFO research.
The Varginha UFO incident involves a series of events in 1996 when residents of Varginha, Brazil claimed seeing one or more strange creatures and at least one unidentified flying object (UFO). Other associated claims include the capture of one or more extraterrestrial beings by the Brazilian authorities, animal fatalities at a zoo, and a woman impregnated by an extraterrestrial. The reports have garnered extensive media coverage.
Xenoarchaeology, a branch of xenology dealing with extraterrestrial cultures, is a hypothetical form of archaeology that exists mainly in works of science fiction. The field is concerned with the study of the material remains to reconstruct and interpret past life-ways of alien civilizations. Xenoarchaeology is not currently practiced by mainstream archaeologists due to the current lack of any material for the discipline to study.
Roadside Picnic is a philosophical science fiction novel by Soviet-Russian authors Arkady and Boris Strugatsky, written in 1971 and published in 1972. It is the brothers' most popular and most widely translated novel outside the former Soviet Union. As of 2003, Boris Strugatsky counted 55 publications of Roadside Picnic in 22 countries.
Contactees are persons who claim to have experienced contact with extraterrestrials. Some claimed ongoing encounters, while others claimed to have had as few as a single encounter. Evidence is anecdotal in all cases.
In ufology, Nordic alien is the name given to alleged humanoid extraterrestrials, purported to come from the Pleiades, who resemble Nordic-Scandinavians. Alleged contactees describe them as being six to seven feet tall with long blond hair, blue eyes, and fair skin. George Adamski is credited with being among the first to claim contact with Nordic aliens in the mid-1950s, and scholars note that the mythology of extraterrestrial visitation from beings with features described as "Aryan" often include claims of telepathy, benevolence, and physical beauty.
Riley Lee Martin was an American self-described alien contactee, author, and radio host. Martin was the author of the book The Coming of Tan, which describes his life and his alleged alien visitation. He hosted The Riley Martin Show on the Sirius XM Radio channel Howard 101. He appeared on The Howard Stern Show and was considered part of the Wack Pack.
Heraldic visitations were tours of inspection undertaken by Kings of Arms throughout England, Wales and Ireland. Their purpose was to register and regulate the coats of arms of nobility, gentry and boroughs, and to record pedigrees. They took place from 1530 to 1688, and their records provide important source material for historians and genealogists.
The Bodysnatchers is an original novel written by Mark Morris and based on the long-running British science fiction television series Doctor Who.
Intruders is a four-hour science fiction miniseries that was first broadcast in 1992. Broadcast on CBS, the miniseries was directed by Dan Curtis and starred Richard Crenna, Daphne Ashbrook and Mare Winningham. It was partially based on Ufology Budd Hopkins' book Intruders: The Incredible Visitations at Copley Woods. Barry Oringer and Tracy Tormé wrote the screenplay.
Robert Orel Dean was an American ufologist from Tucson, Arizona.
Ancient Aliens is an American television series produced by Prometheus Entertainment that explores the pseudoscientific hypothesis of ancient astronauts in a non-critical, documentary format. Episodes also explore related pseudoscientific and pseudohistoric topics, such as: Atlantis and other lost ancient civilizations, extraterrestrial contact and ufology, and popular conspiracy theories. The series, which has aired on History since 2010, has been a target for criticism of History's channel drift, as well as criticism for promoting unorthodox or unproven hypotheses as fact. According to Smithsonian, episodes of the series overwhelm the viewer with "fictions and distortions" by using a Gish gallop.
Alien abduction entities are the beings alleged to secretly abduct and subject experiencers to a forced medical examination which often emphasizes their reproductive system. Mainstream scientists and mental health professionals overwhelmingly doubt that the phenomenon occurs literally as reported and instead attribute the experiences to "deception, suggestibility, personality, sleep phenomena, psychopathology, psychodynamics [and] environmental factors." Skeptic Robert Sheaffer also sees similarity between the aliens depicted in early science fiction films, in particular, Invaders From Mars, and those reported to have actually abducted people. The first alien abduction claim to be widely publicized was the Betty and Barney Hill abduction in 1961, which featured diminutive, large-eyed beings who wore military-style uniforms.
The interdimensional hypothesis is a proposal that unidentified flying object (UFO) sightings are the result of experiencing other "dimensions" that coexist separately alongside our own in contrast with either the extraterrestrial hypothesis that suggests UFO sightings are caused by visitations from outside the Earth or the psychosocial hypothesis that argues UFO sightings are best explained as psychological or social phenomenon.