Ultraterrestrial hypothesis
From the UAP Encyclopedia, the open encyclopedia of UFO and UAP history · 📖 Term
Contents 6
| Type | Term |
|---|---|
| Also known as | ultraterrestrial |
| On the Timeline | 1 event, 2022 |
The ultraterrestrial hypothesis, also called the interdimensional hypothesis, is the proposal that UFOs and their occupants do not come from other planets but from other dimensions or realities that coexist with ours. Its supporters argue that UFOs are a modern form of a phenomenon that earlier societies described as fairies, spirits or other supernatural beings.[1]
Early ideas
The earliest proponent is usually said to be Meade Layne, who on 4 July 1947, days after the first wave of "flying disc" reports, described the objects as "etheric", able to pass between an etheric and a dense level of matter. He developed the idea in The Ether Ship Mystery and Its Solution (1950).[1]
John Keel
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Writer John Keel coined the word "ultraterrestrials" for beings that exist in a range of energy humans cannot detect. In Operation Trojan Horse (1970) he argued that a non-human intelligence had staged appearances throughout history, using whatever form fitted the beliefs of the time, from ghosts and fairies to the "mystery airships" of the 1890s.[1][2]
Vallée and Hynek
Jacques Vallée's Passport to Magonia (1969) compared modern UFO encounters with folklore about fairies and suggested a parallel universe coexisting with ours. In The Edge of Reality (1975), J. Allen Hynek and Vallée discussed the possibility of "interlocking universes", Hynek suggesting that our space-time might be a cross-section of a universe with many more dimensions. In a 1990 paper, "Five Arguments Against the Extraterrestrial Origin of Unidentified Flying Objects", Vallée argued that there are far more close encounters than a physical survey would need, that humanoid aliens are biologically unlikely, and that abduction reports do not fit a scientific-experiment model.[1][3]
Arguments
Supporters point to similar accounts throughout recorded history and to reports of UFOs appearing to manipulate space and time. The idea lies outside mainstream science, and skeptics regard both it and the extraterrestrial hypothesis as unnecessary when reports can be explained by misidentification, hoaxes and psychology.[1][4]
On the UAP Timeline
- Ultraterrestrial hypothesis paper (31 July 2022) — Puthoff releases a paper on the 'ultraterrestrial' hypothesis.
References
- Interdimensional hypothesis — Wikipedia · en.wikipedia.org · archived copy
- Tim Lomas, "The ultraterrestrial hypothesis", Journal of Transpersonal Psychology 55(1) (2023) · researchgate.net · archived copy
- Chris Tattoli, "Jacques Vallée Still Doesn't Know What UFOs Are", Wired · wired.com · archived copy
- Extraterrestrial UFO hypothesis — Wikipedia · en.wikipedia.org · archived copy
This page was last edited on 29 October 2026. Articles are written in our own words from the sources listed under References; disputed claims are attributed to the people who made them.
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