Quick naps not only improve your alertness, but they also help in decision making, creativity and sensory perception.
149
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Bats sleep 18-20 hours per day.
5
If you hold farts in during the day, they'll just come out when you sleep.
16
You burn more calories sleeping than you do watching television.
348
Dieters who sleep more take off more fat that those who sleep less.
159
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212