John Campbell and Asch Harwood

John Campbell, a former U.S. ambassador to Nigeria, is senior fellow for Africa at the Council on Foreign Relations, where he also blogs. Asch Harwood is an Africa analyst.

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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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