47% of people have a nightmare at least once a month.
186
Lack of water is the #1 trigger of daytime fatigue.
148
The strangers in your dreams are actually people that you've seen in real life.
50
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
The average cat sleeps about 2/3 of the day.
203
The human brain is more active during sleep than during the day.
28