Kevin Ryan and Tina Kelley

Kevin Ryan is the president and CEO of Covenant House International. Tina Kelley is a former New York Times reporter who has also worked for The Philadephia Inquirer and The Seattle Times.

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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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