https://old.reddit.com/r/BedBros/
https://old.reddit.com/r/InclinedBedTherapy/
https://old.reddit.com/r/sleephackers/
https://old.reddit.com/r/polyphasic/top/
https://crescent.co/
https://www.lesswrong.com/posts/sbcmACvB6DqYXYidL/counter-theses-on-sleep