The theory that UFOs come from Earth, not space
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What if flying saucers come from beneath Earth itself — not outer space — and have been here all along, hiding in plain sight?
Cryptoterrestrial HypothesisFermi ParadoxOccam's RazorConspiracy Theory
Theory Briefing
- The cryptoterrestrial hypothesis flips the standard UFO assumption: the craft originate from Earth, not from another star system.
- Instead of alien visitors, the theory proposes an advanced civilization already here — underground, undersea, or otherwise concealed.
- The hypothesis reframes decades of sighting reports as evidence of something native to Earth evading detection, not arriving from space.
- It raises the question of why a terrestrial origin is considered more fringe than an interstellar one, given the same evidence.