exogenesis
aliensdidit
alien
xenobiology
xenophysics
xenoscience
xenopaleontology
Fermi paradox
paleocontact
visitor
ancient astronaut
xenogeology
extramundane
ultramundane
exobiology
space biology
extraplanetary
bolide
Rare Earth hypothesis
astrobiology
cosmogenous
extraterrestrially
paleocontact hypothesis
ancient astronaut hypothesis
xenomorphology
xeno-
xenobiochemistry
ultratelluric
xenoanthropology
xenoengineering
exocommunication
spacy
UFO
flying saucer
Raëlism
unidentified flying object
extraterrestrialization
extraterrestrialness
xenotechnology
alienesque
extraterrestrial being
exopolitics
extraterrestrial
extraterrene
xenochemistry
alienage
xenology
eetee
xenosociology
Elohim