Stephen J. Dubner, co-author of the best-selling Freakonomics books and host of Freakonomics Radio, tapes his new podcast “Tell Me Something I Don’t Know,” which he describes as “journalism wrapped in a game-show package.” Each night’s two shows, recorded before a live audience, feature a new co-host; tonight’s co-hosts are Top Chef’s Gail Simmons (6:30 p.m.) and Penn psychologist and ‘Grit’ author Angela Duckworth (9:30 p.m.).

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