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  1. Memory echoes in brain’s sensory terrain

    The process of remembering an event reactivates brain regions that were involved in initially seeing or hearing the event.

    By Bruce Bower
  2. Health & Medicine

    Insulin inaction may hurt even nondiabetics

    Flawed insulin activity may lead to blood changes that foster atherosclerosis, even in people who don't have diabetes.

    By Janet Raloff
  3. 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.

    By Ron Cowen
  4. Plants

    Glitch splits hermaphrodite flowers

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