> Your body's internal clock is actually 24 hours 11 minutes long on average

Wasn't that debunked? Just look at what happened to people who slept in a cave for a few days, they came out of it having no idea of how long they were in there, even if they were somehow conditioned by others who guessed their own time. If the body had an internal clock, their estimation would not be off by 17 days out of 40. That's some serious mismatch.

https://www.insidehook.com/daily_brief/science/french-cave-d...