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  1. Chemistry

    New champions among corrosive microbes

    Newly discovered strains of bacteria have developed a metabolic shortcut for eating away iron with great efficiency.

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  2. Materials Science

    Cinching nanotubes into tough fibers

    Irradiating bundles of carbon nanotubes can lead to tougher fibers.

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  3. Physics

    Radioactive sprinkles keep machines true

    Needing tiny radioactive sources to calibrate medical scanners with ever-sharper vision, an Australian team dipped tiny balls the size of candy sprinkles into a radioactive liquid.

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  4. 19388

    I can think of a place other than the moon where NASA could develop a closed life-support system for staging rehearsals of manned Mars exploration.