News

  1. Health & Medicine

    Excreted Tamiflu found in rivers

    A Japanese study finds that excreted Tamiflu ends up in river water, raising concerns that birds hosting a flu virus will develop drug-resistant strains.

    By Janet Raloff
  2. Astronomy

    MESSENGER captures new images of Mercury during a third passage

    MESSENGER flew past Mercury for a third time on September 29. The spacecraft's mission will continue, with MESSENGER due to settle into a yearlong orbit around Mercury in March 2011.

    By Ron Cowen
  3. Chemistry

    Earth’s ‘boring billion’ years blamed on sulfur-loving microbes

    A new study suggests these organisms could have kept oxygen levels low and waters toxic, stalling the evolution of complex life.