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TED talks brings the cerebral to the wonk town

October 26, 2012 9:04 PM EDT TEDx, a kind of “TED Talks lite,” had its first of two days this Friday. Speakers ran the gamut from opera singers who’d had lung transplants to scientists who help guide the Curiosity Mission to Mars. The event’s second and final day is Saturday, October 27 in Chinatown. (Brad Horn / The Washington Post)

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