You will spend roughly 26 years of your life unconscious. Science still cannot fully explain why. In this episode we trace what the research actually shows about mortality rates, cognitive collapse, and the brain cleaning itself while you sleep. We follow it to the edge of what we know. Then we ask what happens if that changes, and we follow every ripple forward. Where we leave the historical record, we tell you.

Go deeper (these are affiliate links. I may earn a small commission at no cost to you):

Why We Sleep by Matthew Walker is the definitive science behind every fact in this episode. https://amzn.to/4vnqiib

For the rem and dream cycles section, current research lives in When Brains Dream by Antonio Zadra and Robert Stickgold.  ...