Puzzles have a long history and are loved by millions of people worldwide. The New York Times crossword alone attracts 20 million people daily. And puzzles come in multiple forms: jigsaws, mazes, manipulable objects like Rubik’s Cubes, and even puzzles that require teams like escape rooms and scavenger hunts. Why do we love puzzles? Can they make us smarter? If so, how? Can they improve our mental or physical well-being? And might there even be a case for them making us better people? These and so many other questions will be answered by my most delightful guest, journalist, lecturer, and, my friend, New York Times best-selling author, AJ Jacobs (https://ajjacobs.com/)! AJ captured my attention nearly 20 years ago when I read his first major book, The Know-it-All, in which he put himself through one of his many self-imposed challenges. That time he read the entire 33,000-page Encyclopedia Britannica in one year and wrote about his insights. Subsequently, as a human guinea pig, he h...