Recorded live in San Francisco. Guests include the keeper of a 10,000-year clock, the co-founder of Lyft, a pioneer in male birth control, a specialist in water security, and a psychology professor who is also a puppy. With co-host Angela Duckworth, fact-checker Mike Maughan, and the Freakonomics Radio Orchestra.

There are a lot of barriers to changing your mind: ego, overconfidence, inertia — and cost. Politicians who flip-flop get mocked; family and friends who cross tribal borders are shunned. But shouldn’t we be encouraging people to change their minds? And how can we get better at it ourselves?