Leslie H. Gelb

President Emeritus, Council on Foreign Relations; author, Power Rules: How Common Sense Can Rescue American Foreign Policy (2009)

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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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