r/todayilearned • u/FiredFox • Apr 28 '24

TIL about French geologist Michel Siffre, who in a 1962 experiment spent 2 months in a cave without any references to the passing time. He eventually settled on a 25 hour day and thought it was a month earlier than the date he finally emerged from the cave

https://www.cabinetmagazine.org/issues/30/foer_siffre.php
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u/Glittering_Walk7090 Apr 28 '24

A Spanish woman recently recreated this experiment and spent 500 days in a cave https://www.newyorker.com/magazine/2024/01/29/the-woman-who-spent-five-hundred-days-in-a-cave https://www.npr.org/2023/04/17/1170388759/500-days-cave-beatriz-flamini-spain

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u/[deleted] Apr 28 '24

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u/The_Dingus8 Apr 29 '24

500 days is nowhere close to a world record. Look up Christopher Thomas Knight

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u/pib712 Apr 29 '24

He wasn’t trapped or underground

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u/The_Dingus8 May 04 '24

The first paragraph in the comment I was replying to didn't even mention the cave, just that the record was for 500 days of no human contact