Ahhhh, babies. We get in bed with producer Hannah Palin, and her husband, and her baby Dominic, as they all try to go to sleep. An intimate portrait of the effects of sleep deprivation. And then we try to understand what sleep is for by looking at what happens when you don't get it. The tired, cranky feeling of exhaustion, what’s that really about? What thing are you missing by not getting sleep? Dr. Allan Pack describes what an exhausted brain looks like (hint: a 14 year-old boy's room). And Dr. Giulio Tononi gives us insight into why a good night of sleep is good for the brain and, as the Sisterhood of Convoluted Thinkers and opera singer Brad Cresswell tell us, good for learning how to play music.

Interactive Game! "Tononi. You decide:" Football Player or Sensitive-Type?