Feature

  1. Health & Medicine

    Mending a Broken Heart

    Transplants of skeletal-muscle cells may help heal hearts damaged by illness or previous heart attacks.

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  2. Planetary Science

    Stormy Weather

    The 11-year cycle of solar storms has begun to peak, already affecting several Earth satellites and disturbing electric power systems on the ground, and scientists expect 2 more years of this solar maximum turmoil.

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  3. Tech

    Beyond Imaging

    No longer just a diagnostic tool, ultrasound tackles surgery.

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  4. Earth

    Macho Waters

    Some river pollution spawns body-altering steroids.

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  5. Math

    Visions of Infinity

    Tiling a hyperbolic floor inspires both mathematics and art.