News

  1. Earth

    Passive smoking’s carcinogenic traces

    Researchers isolated markers of a cigarette-generated carcinogen in urine of nonsmoking women married to smokers.

    By Janet Raloff
  2. Health & Medicine

    Fatty plaques are unstable in vessels

    Fatty plaques that form on the inside of blood vessels are less stable and hence more prone to rupture than are hard, calcified plaques.

    By Nathan Seppa
  3. Health & Medicine

    Parkinson’s implants survive in brain

    Human embryonic stem cells transplanted into the brains of people with Parkinson's disease survive and grow better in patients under 60 years of age than in older patients.

    By Nathan Seppa
  4. Astronomy

    Creating a warmer, wetter Mars

    A new study adds to the evidence that past volcanic activity could have temporarily created a warmer, wetter Mars, a place on which water once flowed freely.