The function of dream sleep (1983) [pdf]
profiles.nlm.nih.gov
profiles.nlm.nih.gov
I'm in the middle of it because of a Hacker News recommendation, and let me pass on the recommendation. It's great so far :)
https://news.ycombinator.com/item?id=17381235
For example, I think most of us now know that napping isn't for the "lazy" but it's nice to see the scientific reasoning for it. The author Walker is a great sleep advocate.
https://www2.mrc-lmb.cam.ac.uk/graeme-mitchison-1944-2018-2/
The 35 year old theory seems equally as likely as the threat-simulation theory. What has made threat-simulation supplant other theories on this topic?