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  1. Health & Medicine

    Defect Detector: Plugging holes in a breast cancer–gene screen

    A genetic test not available in the United States catches many potentially cancer-causing BRCA-gene mutations not detected by the sole U.S. test.

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  2. Plants

    Reality Botany: Data ease doubts about plant species

    Despite the doubts of some botanists, plant species aren't just some arbitrary human classification scheme, says a team of evolutionary biologists.

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  3. Mood Meds’ Second Wind: Depression drugs aided by extra treatment step

    A second, modified course of drug treatment fosters recovery in a substantial minority of depressed adults who don't feel better after treatment with a commonly prescribed antidepressant.

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  4. Earth

    Tiny Bubbles: Oldest evidence yet for methane makers

    Analyses of the gases dissolved in water trapped in ancient minerals suggest that methane-generating microbes have been around almost 3.5