UFO-related phenomena

pattern in a crop field

pseudoscientific claims of past alien contact

historical concept proposing that the planet Earth is entirely hollow or contains a substantial interior space

phenomenon of people being taken against their will or being intruded in their private space by alien beings according to their memory

unidentified object submerged in water

type of religion which is partly based on beliefs about UFOs or extraterrestrial aliens

claimed UFO and/or alien encounter

unexplained light usually seen in the Hessdalen valley in Norway

straight alignments between historic structures and landmarks

suspicion that facts of extraterrestrial visitors are kept secret from the general public

killing and mutilation of cattle in unusual and anomalous ways

photograph by Jim Templeton

atmospheric phenomenon

fictional Nazi technological warfare device

unusual lights seen in West Texas

gelatinous substance sometimes found on the ground

rocket launch phenomenon

material allegedly emitted by UFOs

thumb|Overflight of The Integratron, June 1975