Deborah Cadbury talks about her book, Princes at War (Public Affairs, April 2015), a deep exploration of the four British royal brothers before, during, and after World War II. She fills in the details of Wallis Simpson’s connection to the Nazis and shows how the three younger brothers stepped up in wartime, in a way their country never imagined they could. And from the PRX STEM Story Project, with support from the Alfred P. Sloan Foundation: we learn about how some blind people are learning to see with echo-location, and we travel with soot particles to see how they become air pollutants.