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
Studies show that the colder the room you sleep in, the more likely you are to have a bad dream.
28
44% of kids watch television before they go to sleep.
106
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
The higher someone’s I.Q. the more likely they are to be sleep deprived.
29
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