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  1. Physics

    Sweet beams: Lasers to measure blood sugar

    Cutting-edge use of light might someday prove useful in gauging diabetics’ glucose levels.

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  2. Space

    Messenger from Mercury

    NASA orbiter returns images of odd landforms on the solar system's innermost planet.

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  3. Health & Medicine

    The mind’s eye revealed

    A new technology uses brain scans to see what a person is watching.

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  4. Life

    Food makes male flies frisky

    Courtship behavior in a classic lab insect is driven by the aroma of dinner.

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  5. Trilayer graphene exhibits quantum effect

    Three could be the magic number for making spintronic devices from thin carbon sheets.