Yeah, I noticed my rythem in absence of anything teathering it to the socially acceptable world is about 28 hours. Weird that I am not alone in this apparently.
Mine settled on 36 hour days and it was fantastic. Plenty of time to work, plenty of time to play, and plenty to sleep, every day. … then I got a 9-5 job and my life became hell again.
i’m pretty confident it’s an evolutionary adaption to ensure there are people in the tribe that are wide awake when others are sleeping, to keep an eye on things.
same thing with neurodivergence, sexualities, and left-handedness; it’s all stuff that’s been boosting our survival as a species when a portion of the population has those differences.
People used to wake up in the middle of the night for a couple of hours then go back to sleep:
https://www.bbc.com/future/article/20220107-the-lost-medieval-habit-of-biphasic-sleep
