Cows can sleep standing up, but they can only dream lying down.
745
You burn more calories sleeping than you do watching television.
348
The average cat sleeps about 2/3 of the day.
203
Blue light fends off drowsiness in the middle of the night, which could be useful to people who work at night.
240
Quick naps not only improve your alertness, but they also help in decision making, creativity and sensory perception.
149
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
Dieters who sleep more take off more fat that those who sleep less.
159
Lack of water is the #1 trigger of daytime fatigue.
148