A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
The harder you concentrate on falling asleep, the less likely you are to fall asleep.
34
The average person falls asleep in seven minutes.
115
Bats sleep 18-20 hours per day.
5
You burn more calories sleeping than you do watching television.
348
Termites work 24 hours per day and they do not sleep.
57
The strangers in your dreams are actually people that you've seen in real life.
50
You can reschedule your sleeping pattern by not eating 12-16 hours before you want to be awake. Upon eating after this time period, your internal clock will reset to a new day, with the time of your first meal being interpreted as "morning".
11