Bats sleep 18-20 hours per day.
5
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
The higher someone’s I.Q. the more likely they are to be sleep deprived.
29
Dieters who sleep more take off more fat that those who sleep less.
159
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
Those who get out of bed by 7am are more likely to be thinner and happier.
20
You forget 90% of your dreams.
256