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by rconti 2303 days ago
The book Why We Sleep discusses the phase of our sleep that has extremely accurate timekeeping. I've forgotten the details, of course. But I think it's quite clear our brains know precisely what time it is.
1 comments
kranner 2302 days ago
A book on sleep (and more) that deserves to be much more widely known is The Head Trip by Jeff Warren:

https://www.goodreads.com/book/show/2168851.Head_Trip

link