Didn't learn anything about it. Didn't learn anything about sunlight, didn't learn anything about photons, didn't learn anything about sleep. You know, We're sleeping 20% less on average than we were 100 years ago. And sleep is a huge risk factor. You can, in an experimental setting, take a young, healthy person and subject them to sleep deprivation for five nights, and they become pre diabetic. (37:03–37:08)
CLAIM
Asserts that average sleep duration has decreased by 20% over the past century.
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