When you think of sleepwalking, what comes to mind? Sleepwalking is a very real sleep disorder that affects adults as well as children, with consequences that can range from the embarrassing to the downright dangerous.

Do you ever feel forgetful and a little sluggish of mind? Do you wish you could pick up new skills more quickly and easily? Here's a tip: You can boost your learning power by beefing up your sleep routine.

You've probably heard about how significant a role stress is believed to play in the development of illness and disease. Here's some sobering and important news: New research indicates that lack of sleep can be as damaging to the immune system as stress.

We know that sleep has a great effect on how we eat. But does how we eat -- or more precisely, what we eat -- have an effect on our sleep? One thing we might not be talking about enough is how choosing the right foods can help strengthen sleep.

A group of studies, all conducted independently, have reached a similar sobering conclusion: Sleep problems -- including several common sleep difficulties faced by millions of people on a regular basis -- may, over time, lead to cognitive impairment and even dementia.

The truth is, we don't know very much about sleep problems on a global level, particularly in developing nations. A new study addressed this gap in research and returned some striking results, estimating that as many as 150 million people worldwide suffer from sleep problems.