In China, teachers allow children to sleep in class for around 20 minutes to help improve their learning.
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A new parent will lose about 1055.6 hours of sleep in the first year of their child's life - almost 44 days!
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Lack of water is the #1 trigger of daytime fatigue.
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47% of people have a nightmare at least once a month.
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A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
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The record for the longest scientifically documented period without sleep is 264.4 hours (eleven days).
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Honeybees never sleep.
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Bats sleep 18-20 hours per day.
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