Lack of water is the #1 trigger of daytime fatigue.
148
Honeybees never sleep.
276
The human brain is more active during sleep than during the day.
28
There's a love mattress that is specifically designed for couples who sleep on each other's arms.
12
Blue light fends off drowsiness in the middle of the night, which could be useful to people who work at night.
240
The strangers in your dreams are actually people that you've seen in real life.
50