Lack of water is the #1 trigger of daytime fatigue.
148
Bats sleep 18-20 hours per day.
5
The human brain is more active during sleep than during the day.
28
Quick naps not only improve your alertness, but they also help in decision making, creativity and sensory perception.
149
The record for the longest scientifically documented period without sleep is 264.4 hours (eleven days).
15
There's a love mattress that is specifically designed for couples who sleep on each other's arms.
12
You burn more calories sleeping than you do watching television.
348
The harder you concentrate on falling asleep, the less likely you are to fall asleep.
34