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extraterrestrial intelligence
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extraterrestrial intelligence: Facts & Related Content

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Did You Know?

  • Area 51 has been a hotspot for alien-related conspiracy theories ever since the Roswell weather balloon crash.
  • Nasca lines, the Egyptian pyramids, Stonehenge, the Easter Island statues, and Teotihuac�n have all been rumoured by conspiracy theorists to have been built by aliens, but they were not.
  • The United States government and military have both studied possible alien sightings and the possibility of extraterrestrial intelligence, likely because of concerns that so-called UFO sightings were actually advanced foreign aircraft.

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artist's conception of Kepler-186f
Arecibo Observatory
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Key People

Jill Tarter
Jill Tarter
American astronomer
Carl Sagan
Carl Sagan
American astronomer
Percival Lowell
Percival Lowell
American astronomer