Radical Anthropology

Sleeping in two shifts, natural for human beings?

https://theconversation.com/why-we-used-to-sleep-in-two-segments-and-how-the-modern-shift-changed-our-sense-of-time-267909

Why we used to sleep in two segments – and how the modern shift changed our sense of time

There’s a reason you sometimes wake up in the middle of the night.

The Conversation
Nov 2 at 12:53pmWeb
Show threadRadical AnthropologyNov 2

Top paper here on #Hadza sleep biology which notices the effect of #moon phase

https://pubmed.ncbi.nlm.nih.gov/28063234/

Hadza sleep biology: Evidence for flexible sleep-wake patterns in hunter-gatherers - PubMed

This study showed that circadian rhythms in small-scale foraging populations are more entrained to their ecological environments than Western populations. Additionally, Hadza sleep is characterized as flexible, with a consistent early morning sleep period yet reliance upon opportunistic daytime napp …

PubMed
Show threadRadical AnthropologyNov 2

And #moonstruck sleep among the Toba, another key paper

https://www.science.org/doi/10.1126/sciadv.abe0465

Moonstruck sleep: Synchronization of human sleep with the moon cycle under field conditions

Sleep is delayed and shortened preceding the full moon phase, both in absence of electric light and in modern urban societies.

Science Advances
Show threadKim Possible Nov 4
@RadicalAnthro I read a book about this. They called it the Second Sleep.