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  1. Health & Medicine

    Vitamin D may be heart protective

    Vitamin D limits arterial plaque buildup in people with diabetes, early tests suggest.

    By Nathan Seppa
  2. Life

    Excess folic acid sits idle

    Humans metabolize folic acid at a slow rate, suggesting that additional folic acid may yield no more benefits than recommended doses do, researchers report.

    By Jenny Lauren Lee
  3. Space

    Extrasolar planets at full tilt

    Violent interactions between planets may have played a key role in shaping the architecture of many extrasolar planet systems. The sun’s planetary system may have escaped or recovered from such a catastrophe.

    By Ron Cowen
  4. Archaeology

    Exhuming a violent event

    Four graves containing 13 skeletons have given scientists a glimpse of a lethal raid that occurred in central Europe 4,600 years ago.