If you hold farts in during the day, they'll just come out when you sleep.
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People who sleep late have more mental stamina and can outperform early risers.
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A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
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In China, teachers allow children to sleep in class for around 20 minutes to help improve their learning.
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Sea otters hold hands while sleeping so they don’t drift away from each other.
104
A new parent will lose about 1055.6 hours of sleep in the first year of their child's life - almost 44 days!
6
The record for the longest scientifically documented period without sleep is 264.4 hours (eleven days).
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