If you hold farts in during the day, they'll just come out when you sleep.
16
Honeybees never sleep.
276
The average cat sleeps about 2/3 of the day.
203
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
You forget 90% of your dreams.
256
You burn more calories sleeping than you do watching television.
348