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Words semantically related to '
extraterrestrial
' are:
UFOs
Seti
meteorites
Sagan
UFO
civilizations
Fermi
meteorite
interstellar
saucer
humanoids
sightings
aliens
humanoid
beings
alien
Planck
hypothesis
reptilian
probes
intergalactic
paranormal
Roswell
ETH
Torchwood
Mulder
telepathic
interplanetary
intelligent
planetary
spaceship
visitation
planets
sentient
unidentified
spacecraft
technologically
abduction
habitable
supervillain
humankind
Astrophysics
paradox
Martian
Milky
terrestrial
cosmic
hypothetical
Mythos
Galactic
theorized
homeworld
orbiting
astronauts
earthly
phenomena
plausible
scientifically
microbial
purported
anomalies
Meteor
Scully
Earth
unexplained
planet
civilization
Andromeda
astronomers
implications
supernatural
moons
superheroes
hypotheses
astronomer
asteroids
cosmology
sighting
Lovecraft
artifact
humanity
futuristic
intelligence
fictional
psychic
superhero
transmissions
explanations
astronaut
origin
universe
robotic
probe
solar
worlds
scientists
Titan
Mars
mankind
Cosmos
