优质睡眠提升记忆，促进身心健康。潘金莲西门庆床戏

　　Sleep has long been regarded as nothing more than a way to charge our batteries. But what if it can control our weight, allow us to make memories, and help us to fight off diseases like Alzheimer’s? We travel the world to investigate how revolutionary new technology has revealed the sleeping brain as an energetic and purposeful machine.