Rem cycle. She had heard of that before, but what was it? She heard her other classmates talking about rapid eye movement, but what did that really have to do with dreaming? unless you were dreaming of something awesome and your eyes are going really fast to keep up. Hmmm...that would be a good point.

Hannah shot her hand in the air. "Professor that it when you are in that good sleep." She knew what that meant right? "That's when your sleep is at it deepest and you are not likely to get disturbed easily." There maybe that explained it a bit more.