this post was submitted on 05 Nov 2025
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archeology
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There was a study where some people lived in utter darkness for several months. After a couple of weeks, they all went on a 48 hour day schedule, meaning they would just sleep once every 48 hours.
Not sure if that answers the question, but it was an interesting and unexpected outcome.
Studies show that in total darkness people have a 24-25 hour rhythm to their sleep.
Sounds like you read an anomolous study.
Maybe it's true for very large values of an hour?
May have disremembered it, I remembered this from years ago and a quick search didn't give me the study so I don't know.
It was / is a real study, you didn't imagine it I guess, but it was an anomaly!
Ah, thanks for clarifying. Glad that my memory is not as terrible as my wife sometimes claims it is (although definitely selective and biased towards obscure tidbits of knowledge).
It does not, but it helps.