Honeybees never sleep.
276
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
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
There's a love mattress that is specifically designed for couples who sleep on each other's arms.
12