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The interdimensional hypothesis (IDH or IH), is an idea advanced by Ufologists such as Jacques Vallée that says unidentified flying objects (UFOs) and related events involve visitations from other "realities" or "dimensions" that coexist separately alongside our own. It is an alternative to the extraterrestrial hypothesis (ETH).〔(【引用サイトリンク】title= UFO Hunters - History of UFOs )〕 IDH also holds that UFOs are a modern manifestation of a phenomenon that has occurred throughout recorded human history, which in prior ages were ascribed to mythological or supernatural creatures.〔 Although ETH has remained the predominant explanation for UFOs by UFOlogists, some ufologists have abandoned it in favor of IDH. Paranormal researcher Brad Steiger wrote that "we are dealing with a multidimensional paraphysical phenomenon that is largely indigenous to planet Earth".〔Steiger, Brad, ''Blue Book Files Released in Canadian UFO Report'', Vol. 4, No. 4, 1977, p. 20〕 Other UFOlogists, such as John Ankerberg and John Weldon, advocate IDH because it fits the explanation of UFOs as a spiritistic phenomenon. Commenting on the disparity between the ETH and the accounts that people have made of UFO encounters, Ankerberg and Weldon wrote "the UFO phenomenon simply does not behave like extraterrestrial visitors."〔〔John Ankerberg & John Weldon, ''The Facts on UFO's and Other Supernatural Phenomena'', (Eugene, OR: Harvest House Publishers, 1992, pp10〕 In the book ''UFOs: Operation Trojan Horse'' published in 1970, John Keel linked UFOs to supernatural concepts such as ghosts and demons. The development of IDH as an alternative to ETH increased in the 1970s and 1980s with the publication of books by Vallée and J. Allen Hynek. In 1975, Vallée and Hynek advocated the hypothesis in ''The Edge of Reality: A Progress Report on Unidentified Flying Objects'' and further, in Vallée's 1979 book ''Messengers of Deception: UFO Contacts and Cults''. Some UFO proponents accepted IDH because the distance between stars makes interstellar travel impractical using conventional means and nobody had demonstrated an antigravity or faster-than-light travel hypothesis that could explain extraterrestrial machines. With IDH, it is unnecessary to explain any propulsion method because the IDH holds that UFOs are not spacecraft, but rather devices that travel between different realities. One advantage of IDH proffered by Hilary Evans is its ability to explain the apparent ability of UFOs to appear and disappear from sight and radar; this is explained as the UFO entering and leaving our dimension ("materializing" and "dematerializing"). Moreover, Evans argues that if the other dimension is slightly more advanced than ours, or is our own future, this would explain the UFOs' tendency to represent near future technologies (airships in the 1890s, rockets and supersonic travel in the 1940s, etc.). IDH is considered a belief system rather than a scientific hypothesis because it is not falsifiable through testing and experiment. Unlike ETH, it is not possible to verify IDH by experiment or by observation because there is no way to detect the alternative realities it postulates. IDH is evaluated by UFOlogists solely on the basis of how well it fits.〔 IDH has been a causative factor in establishing UFO religion.〔 == See also == * Elemental * Etherian * Interdimensional being * Multiverse * Many-worlds interpretation 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Interdimensional hypothesis」の詳細全文を読む スポンサード リンク
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