Midnight Cave: The Time Experiment

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