In China, teachers allow children to sleep in class for around 20 minutes to help improve their learning.
13
47% of people have a nightmare at least once a month.
186
Honeybees never sleep.
276
The human brain is more active during sleep than during the day.
28
Bats sleep 18-20 hours per day.
5
Sea otters hold hands while sleeping so they don’t drift away from each other.
104
The average cat sleeps about 2/3 of the day.
203