Bats sleep 18-20 hours per day.
5
The average cat sleeps about 2/3 of the day.
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There's a love mattress that is specifically designed for couples who sleep on each other's arms.
12
The record for the longest scientifically documented period without sleep is 264.4 hours (eleven days).
15
The human brain is more active during sleep than during the day.
28
The harder you concentrate on falling asleep, the less likely you are to fall asleep.
34
Honeybees never sleep.
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One reason that kittens sleep so much is because a growth hormone is released only during sleep.
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