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What Your Bedtime Says About You with Professor Matt Walker
The Checkup with Doctor Mike
The Evolution of Chronotype Variability
We were typically not solo sleepers or coupled sleepers. We were actually group sleepers, so we were typically sleeping groups as a tribe. Each one of those individuals in the tribe is going to be vulnerable at night for eight hours stretch if we just assume eight hours. So Mother Nature compressed the threat, the time threat period from eight hours all the way down to two hours by creating this thing that we call chronotype variability.
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