EntityQ2719301· pop 10· linked from 713 articlesextraterrestrial hypothesisSign in to savehypothesis that some unidentified flying objects are occupied by extraterrestrial lifeConnectionsexoplanetEntityoptical illusionEntitysearch for extra-terrestrial intelligenceEntityflying saucerEntityalien abductionEntityMars sample return missionEntityPentagon UFO videosEntityBreakthrough InitiativesEntityMutual UFO NetworkOrganization1952 Washington, D.C. UFO incidentEntityinterdimensional hypothesisEntityCondon CommitteeOrganizationNational Investigations Committee On Aerial PhenomenaCompanypsychosocial hypothesisEntityGEIPANOrganizationThe Age of DisclosureWorkBibleEntityNew York CityCityArchimedesEntitylifeEntityCategories20th-century neologismsAlleged extraterrestrial visitationPseudoscienceUFO conspiracy theoriesUfology