Sea otters hold hands while sleeping so they don’t drift away from each other.
104
The average cat sleeps about 2/3 of the day.
203
People who sleep late have more mental stamina and can outperform early risers.
33
Cows can sleep standing up, but they can only dream lying down.
745
Termites work 24 hours per day and they do not sleep.
57
Lack of water is the #1 trigger of daytime fatigue.
148
Some people have a "natural alarm clock" allowing them to wake up when they want. This is actually caused by a burst of the stress hormone adrenocorticotropin.
15
The higher someone’s I.Q. the more likely they are to be sleep deprived.
29