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  1. Chemistry

    Molecules get microscopic bar code labels

    Researchers have created tiny, striped tags for labeling and tracking biologically important molecules.

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  2. Health & Medicine

    Chemical Neutralizes Anthrax Toxin

    Scientists have created a synthetic compound that, when tested in rats, disables the toxin that makes anthrax lethal.

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  3. Physics

    Magnets, not magic, make gas bulbs bad

    Once as baffling as black magic, the random failures of glass bulbs used in magnetic resonance imaging (MRI) now appear to stem from unexpected magnetization of the glass.

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  4. Math

    Spotting Ladybugs

    Ladybugs are among the most familiar of beetles.