Lack of water is the #1 trigger of daytime fatigue.
148
The average cat sleeps about 2/3 of the day.
203
The human brain is more active during sleep than during the day.
28
Cows can sleep standing up, but they can only dream lying down.
745
The harder you concentrate on falling asleep, the less likely you are to fall asleep.
34
People who sleep late have more mental stamina and can outperform early risers.
33