Freakonomics co-author Steve Levitt tracks down other high achievers for surprising, revealing conversations about their lives and obsessions. Join Levitt as he goes through the most interesting midlife crisis you’ve ever heard — and learn how a renegade sheriff is transforming Chicago's jail, how a biologist is finding the secrets of evolution in the Arctic tundra, and how a trivia champion memorized 160,000 flashcards.To get every show in our network without ads and a monthly bonus episode of Freakonomics Radio, sign up for SiriusXM Podcasts+ on Apple Podcasts at http://apple.co/SiriusXM.