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  1. Math

    Outstanding, superlinear cities

    By a new mathematical method, New York City proves average and San Francisco exceptional.

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  2. Physics

    Light can generate lift

    Researchers create a lightfoil that can push small objects perpendicularly.

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  3. Earth

    Icequake swarms portend some avalanches

    By keeping an ear to the ice, scientists can predict impending glacial crack-ups two weeks in advance.

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  4. Life

    Just warm enough

    Mammals may have evolved a characteristic body temperature to avoid fungal infections without burning too hot.

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  5. Life

    Wealth and ambition

    A week in fancier digs inspires rats to seek richer rewards.