A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
The higher someone’s I.Q. the more likely they are to be sleep deprived.
29
Lack of water is the #1 trigger of daytime fatigue.
148
You forget 90% of your dreams.
256
There's a love mattress that is specifically designed for couples who sleep on each other's arms.
12
The average person falls asleep in seven minutes.
115
Termites work 24 hours per day and they do not sleep.
57