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What Your Bedtime Says About You with Professor Matt Walker
The Checkup with Doctor Mike
Understanding the Evolution of Chronotype Variability
Chronotype variability may be an elegant design by Mother Nature to mitigate the vulnerability of humans during sleep. Historically, humans slept in groups, allowing some to go to bed earlier while others stayed up later, reducing the collective vulnerability window. This variation in sleep patterns compressed the vulnerable time period from eight hours to just two hours, enhancing safety during unconsciousness. Therefore, chronotype variability could be a strategic evolutionary adaptation rather than an error in biology.
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