Termites work 24 hours per day and they do not sleep.
57
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 record for the longest scientifically documented period without sleep is 264.4 hours (eleven days).
15
Dieters who sleep more take off more fat that those who sleep less.
159
You forget 90% of your dreams.
256
The human brain is more active during sleep than during the day.
28
47% of people have a nightmare at least once a month.
186