Sea otters hold hands while sleeping so they don’t drift away from each other.
104
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Honeybees never sleep.
276
You burn more calories sleeping than you do watching television.
348
Lack of water is the #1 trigger of daytime fatigue.
148
Those who get out of bed by 7am are more likely to be thinner and happier.
20
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
The strangers in your dreams are actually people that you've seen in real life.
50