This piece is a couple of months old, but won’t fail to twist your brain. You’ve probably been lucky enough not to experience such a situation yourself, but solitary confinement and complete darkness do strange things to people’s brains fairly quickly. For example, researchers have found that in darkness, most people eventually adjust to a 48-hour cycle: 36 hours of activity followed by 12 hours of sleep.

From Weekly Filet #178, in October 2014.