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  1. Life

    How a life-threatening allergic reaction can happen so fast

    Cells that act as sentries facilitate quick communication between allergens and anaphylaxis-triggering immune cells, a study in mice finds.

    By Laurel Hamers
  2. Life

    The number of calories you burn while resting depends on the time of day

    This daily cycle of calorie burning is one of the many body processes that follow a biological clock.

    By Tina Hesman Saey
  3. Health & Medicine

    A new drug may boost dwindling treatment options for gonorrhea

    An antibiotic that targets the bacteria that causes gonorrhea proved effective in treating patients in a clinical trial.

    By Aimee Cunningham
  4. Neuroscience

    Marijuana may change the decision-making part of teen brains

    A marijuana-like drug given to male rats during adolescence changed the structure of their brains.