Lack of water is the #1 trigger of daytime fatigue.
148
Blue light fends off drowsiness in the middle of the night, which could be useful to people who work at night.
240
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
The harder you concentrate on falling asleep, the less likely you are to fall asleep.
34
47% of people have a nightmare at least once a month.
186
People who sleep late have more mental stamina and can outperform early risers.
33