1.Not getting enough sleep very visibly shows on your skin.
2.Sleep deprivation increases appetite, with one study finding that sleep-restricted subjects ate an extra 559 calories per day on average.
3.Getting more sleep can lead to more sex (for women, at least).
4.40% of all American adults are sleep deprived, getting less than the recommended minimum of seven hours of sleep per night.
5.Similar polls showed that 32-60% of people in the UK, more than a third of people in Germany, and two-thirds of those in Japan do not get sufficient sleep during the week.
6.After being awake for 17-19 hours, you may experience cognitive impairment similar to having a blood alcohol level of .05%.
7.If you stay awake for a few more hours beyond that, your cognitive impairment increases to the equivalent of legal drunkenness — 0.1%.
8.Car accidents caused by sleepiness have a fatality rate and injury severity level similar to those caused by alcohol.
9.But the incidence of death from all causes increases by 15% when you sleep less than five hours a night.
Arianna Huffington's The Sleep Revolution is in stores now. To learn more, click here.