Trita Parsi

Trita Parsi, president of the National Iranian American Council, is the author of A Single Roll of the Dice: Obama's Diplomacy with Iran.

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Cryotherapy's Dubious Appeal

James Hamblin tries a questionable medical treatment.

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Confessions of Moms Around the World

In Europe, mothers get maternity leave, discounted daycare, and flexible working hours.

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How Do Trees Know When It's Spring?

The science behind beautiful seasonal blooming

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