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  1. Plants

    Glitch splits hermaphrodite flowers

    In a newly proposed scenario, polyploidy may trigger perfectly good hermaphrodite plants to evolve gender forms.

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  2. Astronomy

    Craft finds where sun’s corona gets its hots

    New findings may help explain an enduring solar riddle: Although the sun's outer atmosphere lies thousands of kilometers above the visible surface of the sun, it's about 1,000 times hotter.

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  3. 19346

    Your article says elevated concentrations of glucose in the blood is “a problem that occurs downstream” of impaired response to insulin. Yet artery blockage is defined as a failure of cells to react to insulin. So, would not the problem be upstream of the impairment? Marry Morel Prescott, Ariz.