47% of people have a nightmare at least once a month.
186
The human brain is more active during sleep than during the day.
28
Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
193
Cows can sleep standing up, but they can only dream lying down.
745
44% of kids watch television before they go to sleep.
106
The average cat sleeps about 2/3 of the day.
203
Sea otters hold hands while sleeping so they don’t drift away from each other.
104
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23