Our resident debunker of nonsense, Maria Konnikova, returns to take on the billion-dollar homeopathy industry. Why aren't homeopathic remedies regulated in the United States? And what can their dubious history tell us about their effectiveness? Maria Konnikova is a contributing writer at the New Yorkerand the author of The Confidence Game.

In the Spiel, watching CNN go haywire for a pretty banal accident on Capitol Hill.

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