A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Honeybees never sleep.
276
The average person falls asleep in seven minutes.
115
Termites work 24 hours per day and they do not sleep.
57
Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
193
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
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212