The average cat sleeps about 2/3 of the day.
203
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
47% of people have a nightmare at least once a month.
186
The harder you concentrate on falling asleep, the less likely you are to fall asleep.
34
Honeybees never sleep.
276