Our curator of domestic life discusses cast iron cookstoves with host Mo Rocca, who also shows us a pool escape ramp for critters, an app helping PTSD survivors, and renewable energy created from crop waste.

Our curator of public life discusses 19th-century medicine with host Mo Rocca, who also shows us how AR is helping surgeons see inside their patients, the doorway roller easing backaches, and a status report on previously featured innovators.