The harder you concentrate on falling asleep, the less likely you are to fall asleep.
34
Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
193
If you hold farts in during the day, they'll just come out when you sleep.
16
The human brain is more active during sleep than during the day.
28
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23