A look at the science of sleep that covers why it's so important, what your body's doing while you're dreaming, what happens when you don't sleep enough, and why the science of sleep research began in a centipede-infested cave. Includes facts about nightmares, sleepwalking, how sleep makes you smarter, and much more.

The ABCs of Zzzzz --Snoring ourselves smarter -- Dr. Doze -- Your wildest dreams -- The bedtime blues.