Sea otters hold hands while sleeping so they don’t drift away from each other.
104
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
People who sleep late have more mental stamina and can outperform early risers.
33
Lack of water is the #1 trigger of daytime fatigue.
148
If you hold farts in during the day, they'll just come out when you sleep.
16
You burn more calories sleeping than you do watching television.
348