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
Cows can sleep standing up, but they can only dream lying down.
745
Those who get out of bed by 7am are more likely to be thinner and happier.
20
The average person falls asleep in seven minutes.
115
You burn more calories sleeping than you do watching television.
348
The human brain is more active during sleep than during the day.
28
Termites work 24 hours per day and they do not sleep.
57