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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The human brain is more active during sleep than during the day.
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Blue light fends off drowsiness in the middle of the night, which could be useful to people who work at night.
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Bats sleep 18-20 hours per day.
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A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
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Sea otters hold hands while sleeping so they don’t drift away from each other.
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You can reschedule your sleeping pattern by not eating 12-16 hours before you want to be awake. Upon eating after this time period, your internal clock will reset to a new day, with the time of your first meal being interpreted as "morning".
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There's a love mattress that is specifically designed for couples who sleep on each other's arms.
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