Sea otters hold hands while sleeping so they don’t drift away from each other.
104
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Studies show that the colder the room you sleep in, the more likely you are to have a bad dream.
28
Lack of water is the #1 trigger of daytime fatigue.
148
44% of kids watch television before they go to sleep.
106
The human brain is more active during sleep than during the day.
28
People who sleep late have more mental stamina and can outperform early risers.
33