What is S-sleep?

What climate zone is Dallas TX? For both hot and cold weather the best type of clothing is? A list of cities are in southeast Texas? What is the value of a book Richard Carvel by Winston Churchhill 1899? What what is the largest nation of North America area? Which type of reasoning starts from specific facts to reach general conclusion? What movie did Doris Day sing doggie in the window? What is the phone number of the Rodin Museum in Philadelphia Pennsylvania? The lowest temp in shanghai? What number is Bengals RB Rudi Johnson? Does a tornado make contact with the ground? Which ions electrical charges oppose the direction of movement that is caused by their concentration gradient? What is the difference between live cattle and feeder cattle? Where can I find more information on cholesterol lowering diet? What are those metal cut out things that lowriders put in the window of their ride? Is the electric eel really electric? What is unpolarized energy? What do you do when a customer was given the wrong amount of change? What are the insights about street children? Where can one find a list of the best web browsers?

What is S-sleep?