One reason that kittens sleep so much is because a growth hormone is released only during sleep.
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Sleeping on the job is acceptable in Japan. It is viewed as exhaustion from working hard. Some people fake it to look committed to their job.
57
Bats sleep 18-20 hours per day.
5
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
The average person falls asleep in seven minutes.
115
There's a love mattress that is specifically designed for couples who sleep on each other's arms.
12