Bats sleep 18-20 hours per day.
5
The average cat sleeps about 2/3 of the day.
203
44% of kids watch television before they go to sleep.
106
You forget 90% of your dreams.
256
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
Cows can sleep standing up, but they can only dream lying down.
745