News

  1. Health & Medicine

    Fewer Drugs, Same Outcome: Simpler HIV regimens are effective

    In two studies, AIDS clinicians found that standard three-drug regimens fight HIV as well as four-drug treatments do, and that a single drug might maintain a patient's health once the virus is suppressed.

    By Eric Jaffe
  2. Astronomy

    New Solar System? Twelve planets and counting (Updated)

    According to a new proposal, the solar system has 12 planets instead of the familiar 9, with several dozen more to come.

    By Ron Cowen
  3. Chemistry

    Mulch matters

    Mulch made from recycled construction and demolition wood can release arsenic into the environment.

    By Aimee Cunningham
  4. Earth

    Grand Canyon fish seem to be rebounding

    The population of humpback chub, an endangered fish found only in the Colorado River and its tributaries, may be stabilizing in some sections of the Grand Canyon.