Mira Rapp-Hooper & Kenneth N. Waltz

Mira Rapp-Hooper, a PhD candidate in political science at Columbia University, specializes in nuclear weapons and nonproliferation. Kenneth N. Waltz, an adjunct professor at Columbia and a professor at the University of California Berkeley, has published widely on nuclear proliferation.

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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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