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  1. Health & Medicine

    Blood vessel growth factor also does housekeeping

    A growth factor that promotes blood vessel development also maintains normal blood vessel health, perhaps explaining the vascular side effects of some cancer drugs.

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  2. Astronomy

    Bloated planet

    A newly discovered exoplanet is the largest and lowest-density such object yet found.

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  3. Chemistry

    Nanoparticles multitask

    Magnetite nanoparticles have catalytic properties that may be useful in wastewater treatment and biomedical assays.

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  4. Archaeology

    Ancient city grew from outside in

    A 6,000-year-old city in what's now northeastern Syria developed when initially independent settlements expanded and merged, unlike other nearby cities that grew from a core outward.