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If you watch a typical documentary about UFOs, you might be forgiven for thinking that there’s a stark and straightforward choice as to what might lie behind these sightings – some sort of misperception or the so-called ETH (extraterrestrial hypothesis) of spacecraft visiting Earth from an alien world. In fact, there have been many other theories of UFO origins over the past six decades...



AWAKENINGS
At a point close to sleep, visual and auditory hallucinations are common, according to psychological studies. False awakenings, where a dream that includes a UFO encounter is misperceived as a waking memory, are also known.