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South Korean rapper Psy performs his massive K-pop hit "Gangnam Style" live on NBC's "Today" show. Jason DeCrow/Invision/AP hide caption

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Planet Money

Gangnam Style: Three Reasons K-Pop Is Taking Over The World

The viral hit isn't a fluke. South Korea has been cultivating a global music business for decades.

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Planet Money

Episode 266: A Former Crack Dealer On The Economics Of Drugs

Lots of economists write about illegal drugs. One thing missing from their papers: Actual drug dealers.

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A page from Pacioli's math encyclopedia, Summa de Arithmetica, Geometria, Proportioni et Proportionalita. via Jane Gleeson-White hide caption

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Planet Money

The Accountant Who Changed The World

The birth of accounting rocked the world 500 years ago. And it involves a man who was a magician, a mathematician, and possibly the boyfriend of Leonardo da Vinci.

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Planet Money

The Weird Story Of Why Helium Prices Are Going Through The Roof

The story begins in the 1920s, when the U.S. government thought blimps might be the next big thing in warfare.

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