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  1. Body’s sweet move can protect heart

    Animal studies suggest that the body attempts to protect itself from heart attacks during brief periods of oxygen deprivation by temporarily modifying heart-muscle proteins.

    By Janet Raloff
  2. Health & Medicine

    Experimental drug boosts HDL counts

    An experimental drug can dramatically increase blood concentrations of high-density lipoprotein, the beneficial cholesterol.

    By Nathan Seppa
  3. Earth

    Hurricanes churn up life-nurturing brews

    Images of the North Atlantic taken from orbit suggest that hurricanes churn the ocean's surface enough to bring cool, nutrient-rich waters to the surface, thereby stimulating algal blooms that can last for weeks.

    By Sid Perkins
  4. Health & Medicine

    CT scan no match for colonoscopy

    Colonoscopy is better at detecting potentially dangerous colon polyps than computed tomography scanning is.