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  1. Tech

    The first artificial material that follows sunlight may upgrade solar panels

    Rows of tiny stemlike rods called SunBOTs orient themselves toward light, optimizing the solar energy that they can harvest.

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  2. Health & Medicine

    50 years ago, cancer vaccines were a dream

    Researchers are now prodding the immune system to fight cancer, reviving the longtime dream of creating cancer vaccines.

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  3. Space

    Voyager 2 reveals the dynamic, complex nature of the solar system’s edge

    With two spacecraft outside the sun’s magnetic bubble, researchers get a new look at the boundary between the sun and its galactic environment.

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  4. Science & Society

    Can neighborhood outreach reduce inner-city gun violence in the U.S.?