In China, teachers allow children to sleep in class for around 20 minutes to help improve their learning.
13
Those who get out of bed by 7am are more likely to be thinner and happier.
20
Dieters who sleep more take off more fat that those who sleep less.
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Sea otters hold hands while sleeping so they don’t drift away from each other.
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Bats sleep 18-20 hours per day.
5
Honeybees never sleep.
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