The harder you concentrate on falling asleep, the less likely you are to fall asleep.
34
You forget 90% of your dreams.
256
The average cat sleeps about 2/3 of the day.
203
Termites work 24 hours per day and they do not sleep.
57
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
193