NPR’s new program on human behavior, Invisibilia, explores the intangible forces that shape human behavior. Co-hosted by NPR’s Lulu Miller and Alix Spiegel, who helped create Radiolab and This American LifeInvisibilia brings new psychological and brain science to life through narrative storytelling. This second episode of the podcast delves into the question of how expectations can sometimes be so powerful that they can overcome physical disability.