One of the most intrepid-and funniest-science writers working today, Mary Roach has explored sex (Bonk), corpses (Stiff), and digestion (Gulp). For her latest, Grunt: The Curious Science of Humans at War, Roach's field research has taken her from Djibouti to a nuclear submarine to answer puzzles about war. Why is DARPA interested in ducks? How is a wedding gown like a bomb suit? Why are shrimp more dangerous to sailors than sharks? WBEZ radio host Peter Sagal joins the bestselling author for an exploration of these mysteries, and more.