News

  1. Health & Medicine

    Efficient Germ: Human body boosts power of cholera microbe

    Some genes in the cholera-causing bacterium Vibrio cholerae are activated and others are silenced when the microbe passes through the human gut, changes that make the bacterium more virulent.

    By Nathan Seppa
  2. Ecosystems

    Plight of the Iguanas: Hidden die-off followed Galápagos spill

    Residues of oil spilled in the Galapágos Islands in January 2001 may have caused a 60 percent decline in one island's colony of marine iguanas.

    By Susan Milius
  3. Health & Medicine

    Transplant Triumph: Cloned cow kidneys thrive for months

    Cow kidneys and other tissue made by cloning ward off immune rejection after transplantation into cows.