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  1. Earth

    A Nation Aflame

    In the wake of one of the worst fire seasons in the past 50 years, scientists are assessing risk as more people move into fire-prone areas and developing ways to better predict the behavior of--and the potential for--wildfires.

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  2. Astronomy

    Distant cluster suggests low-weight cosmos

    Lured by the radio beacon of a faraway galaxy, astronomers have discovered the most distant cluster of galaxies known in the universe.

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  3. Can visiting a plant ruin an experiment?

    Merely walking up to a plant and handling its leaves may skew outcomes in studies of predators attacking plants.

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  4. Health & Medicine

    Active lung gene signals cancer spread

    The newly discovered LUNX gene, active only in lungs and in lung tumors that have spread outside that organ, may help in determining which lung cancer patients are likely to suffer a recurrence.