How Do We Dream? - And Other Questions About Your Body

Dr. Jack Myers answers questions like:

* What causes a person to yawn? Does it really mean the body needs rest?
* How come if you clap your hands underwater you can't make a sound?
* What makes people laugh?
* Why does crying make your nose run?
* Why do people have hair?
* What is the cause of sleepwalking?

and many more.......