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Episode 161 - Sleep

The Common Descent Podcast

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How Much Sleep Do Animals Need?

Large animals tend to sleep less. Armadillos are famous for being long slept animals. They can just sleep whole days. So it's different animals just need different amounts of sleep. And they're not lacking sleep. We don't see that those animals that sleep less tend to sleep more deeply. It can shift throughout your life, both sleep duration and amount of REM sleep. Smaller animals cycle more quickly between non-rem and REM sleep. bigger animals cycle more slowly.

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