Before she decided to become a poker pro, Maria Konnikova didn’t know how many cards are in a deck. But she did have a Ph.D. in psychology, a brilliant coach, and a burning desire to know whether life is driven more by skill or chance. She found some answers in poker — and in her new book The Biggest Bluff, she’s willing to tell us everything she learned.

In this new addition to the Freakonomics Radio Network, co-hosts Stephen Dubner and Angela Duckworth discuss the relationship between age and happiness. Also: does all creativity come from pain? New episodes of "No Stupid Questions" are released every Sunday evening — please subscribe wherever you get your podcasts.