/r/caving
In 1962 the founder of the French Institute of Speleology, Michel Siffre entered a darkened cave, where he planned to remain for two months tracking time assuming 1 sleep equals one day, but he was off by 2 weeks.
Mark as read: Add to a list
Mark as read: Add to a list
Mark as read: Add to a list
Mark as read: Add to a list
Mark as read: Add to a list