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  1. Tech

    Sparing the rare earths

    Potential shortages of useful metals inspire scientists to seek alternatives for magnet technologies

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  2. BOOK REVIEW: The Man of Numbers: Fibonacci’s Arithmetic Revolution by Keith Devlin

    Review by Devin Powell.

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  3. BOOK REVIEW: The New Universe and the Human Future: How a Shared Cosmology Could Transform the World by Nancy Ellen Abrams and Joel R. Primack

    Review by Ron Cowen.

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  4. The Bleeding Disease: Hemophilia and the Unintended Consequences of Medical Progress by Stephen Pemberton

    A historian shows how advances in treatment made hemophilia manageable — yet led to many deaths from HIV-tainted plasma.