Sea otters hold hands while sleeping so they don’t drift away from each other.
104
Quick naps not only improve your alertness, but they also help in decision making, creativity and sensory perception.
149
You burn more calories sleeping than you do watching television.
348
Termites work 24 hours per day and they do not sleep.
57
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212