Termites work 24 hours per day and they do not sleep.
57
People who sleep late have more mental stamina and can outperform early risers.
33
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
In China, teachers allow children to sleep in class for around 20 minutes to help improve their learning.
13
The harder you concentrate on falling asleep, the less likely you are to fall asleep.
34
Honeybees never sleep.
276
Lack of water is the #1 trigger of daytime fatigue.
148