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Old 04-08-2020, 09:15 AM
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StainlessSteelCynic StainlessSteelCynic is offline
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Join Date: Feb 2009
Location: Western Australia
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More than that, it severely messes with your sense of time and other normal body rhythms.
I dimly recall a study done decades ago in which an Italian woman spent some time underground. One of her observations was that she "naturally" moved to a longer awake cycle, (about 20 to 24 hours).
Trying to find the specific study I haven't had any success yet but a web search did pull up the following account of an Italian man who spent nearly a year alone in a cave. I believe the woman also mentioned in this article is the one I was thinking of initially.
The man reported that he believed he'd been underground for 219 days when in fact it had been 366.
And more alarmingly, the woman who was only 27 years old at the time, mentioned that during her stay out of the sun for four months, her menstrual cycle stopped.

The following article is an interview with a French geologist (Michel Siffre) who spent two months isolated in a cave. It also notes the change in perception of time and in one example it mentions that as part of the protocols Siffre operated under, every time he called his support team on the surface, he would count out 120 seconds (i.e. two minutes). It was discovered that Siffre took five minutes to count to what he thought was two minutes.

And then there's this article from 2008 by the Daily Mail newspaper in which a study was apparently done subjecting the volunteers to 48 hours in total darkness & isolation. The results are interesting to say the least, let's just say that if you are stuck in a bunker for some time, you better hope the lights stay on!
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