The union that represents N.F.L. players conducted their first-ever survey of workplace conditions, and issued a report card to all 32 teams. What did the survey reveal? Clogged showers, rats in the locker room — and some helpful insights for those of us who don’t play pro football.   For show notes, visit freakonomics.com/podcast/when-is-a-superstar-just-another-employee/

Guest host Adam Davidson looks at what might happen to your job in a world of human-level artificial intelligence, and asks when it might be time to worry that the machines have become too powerful. (Part 2 of "How to Think About A.I.")