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  1. Planetary Science

    Little Enceladus disturbs Saturn’s magnetic field

    Saturn's tiny moon Enceladus is acting as a brake on the giant planet's magnetic field.

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  2. Physics

    Tiny particles baffle physicists, again

    An experiment failed to confirm the existence of a new elementary particle called the sterile neutrino, but its results could still point to some new physics.

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  3. Earth

    On the rocks

    New research explains why a cancer-causing form of chromium has been turning up in ground and surface waters far from industrial sources.

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  4. Physics

    Toward imaging single biomolecules

    Experiments have given additional evidence that a future generation of X-ray sources called free-electron lasers may be able to image single biomolecules.