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  1. Planetary Science

    Solar-staring spacecraft shows its flare

    A new image of the sun's chromosphere, a layer sandwiched between the sun's visible surface and its outer atmosphere, shows a surprisingly complex structure of filaments of roiling gas that promises to shed new light on why the sun erupts.

    By Ron Cowen
  2. Health & Medicine

    Balancing Act: Excess steroids during pregnancy may pose risks for offspring

    Heavy amounts of steroids taken during pregnancy can have long-term deleterious effects on offspring, a study of monkeys shows.

    By Nathan Seppa
  3. Health & Medicine

    Risky Flames: Firefighter coronaries spike during blazes

    A disproportionate number of heart disease deaths among firefighters occur during blazes.