1150: "Second Sleep"
Interesting Things with JC #1150: "Second Sleep" – What if waking up at night wasn’t insomnia, but a link to an ancient rhythm?
Long before electric lights, humanity followed two distinct phases of sleep. Discover how this practice shaped cultures and what science reveals about its benefits today.
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Ref - Ekirch, A. R. (2005). At day's close: Night in times past. W. W. Norton & Company. ISBN: 978-0393329018