News

  1. Health & Medicine

    Bacteria Provide a Frontline Defense

    Bacteria genetically engineered to secrete microbe-killing compounds can fight disease in mice and rats.

    By Nathan Seppa
  2. Health & Medicine

    Busy hospitals may not be best choice

    A large number of heart surgeries done at a hospital doesn't always correlate with a low mortality rate from such operations at the facility.

    By Nathan Seppa
  3. Earth

    Ice-dammed lakes had cooling effect

    New computer simulations suggest that massive lakes in northern Russia—formed when an ice sheet blocked the northward flow of rivers about 90,000 years ago—significantly cooled the region's climate in summer months.

    By Sid Perkins
  4. Humans

    Better protection from mad cow disease

    The Food and Drug Administration has announced several new measures to keep meat that's potentially infected with mad cow disease out of food supplies.