Midnight Cave: The Time Experiment

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Michael Siffre has spent months at a time alone underground with no outside reference to time. Why? To study human chronology and the effects of isolation. 

“Experiences Hors du Temps” is a film about his 1962 experiment in a Texas cave. He spent two months underground with no access to sunlight or a clock, and studied its effects on his mind and body. ©Haverand