A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
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There's a love mattress that is specifically designed for couples who sleep on each other's arms.
12
Sleeping on your stomach can induce weirder, scarier, and sexier dreams.
22
Honeybees never sleep.
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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!
6
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
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Those who get out of bed by 7am are more likely to be thinner and happier.
20