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. Join the Freakonomics Radio Plus membership program for weekly member-only episodes of Freakonomics Radio. You’ll also get every show in our network without ads. To sign up, visit our show page on Apple Podcasts or go to freakonomics.com/plus.