One reason that kittens sleep so much is because a growth hormone is released only during sleep.
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In China, teachers allow children to sleep in class for around 20 minutes to help improve their learning.
13
Bats sleep 18-20 hours per day.
5
You burn more calories sleeping than you do watching television.
348
The average cat sleeps about 2/3 of the day.
203
The strangers in your dreams are actually people that you've seen in real life.
50
"Dysania" is the state of finding it hard getting up out of bed in the morning.
33