The statistics are alarming: According to the World Association of Sleep Medicine, about 45 percent of the world's population isn't getting enough sleep. See more »

Research shows that when we've had too little sleep, our brain activity makes us overly optimistic, so we make some bad choices. See more »

You've been looking forward to your European vacation for months. But the first few days of your trip, you're grouchy, exhausted and brain dead. Is there some way to prevent or cure jet lag? See more »

Narcolepsy causes sufferers to fall asleep unexpectedly. How does it work? See more »

One of the top-prescribed sleeping pills may cause you to shuffle out of bed and sleepwalk to the fridge. Could Ambien be making you sleepy and hungry? See more »

Every night, millions of people get mediocre rest because breathing problems disrupt their sleep cycle. Take this quiz to learn about sleep apnea. See more »

Think you might have a sleep disorder? Learn more about the 9 most common sleep disorders. See more »

The specific cause of restless legs syndrome is unknown, but there are several nutritional concerns that should be considered. Learn how diet can help treat the symptoms of restless legs syndrome. See more »

The causes of insomnia are as numerous as the forms it takes. Learn how to combat insomnia arising from medical conditions, jet lag and other causes. See more »

If you dread sleep instead of looking forward to it, that’s a clue that your sleeplessness may be heading toward chronic status. Insomnia or another sleep disorder may be contributing to a less-than-rested you. Learn more here. See more »