News

  1. Chemistry

    The Dirt on Art: Chemists test laser cleanup of paintings

    A new experiment shows that lasers can be a safe tool for cleaning paintings.

    By Jessica Gorman
  2. Health & Medicine

    Acetaminophen in Action: Effect on an enzyme may stop pain, lower fever

    The discovery of an enzyme scientists are calling cyclooxygenase-3, which is disabled by acetaminophen, might explain why this drug can stop pain and fever but not inflammation.

    By Nathan Seppa
  3. Astronomy

    Hole in the Middle: Are midsize black holes the missing link?

    Two teams of astronomers reported that they had confirmed the existence of a new class of black hole.

    By Ron Cowen
  4. Earth

    Cancer Causer? Researchers zero in on leukemia risks

    Researchers add to mounting evidence that household pesticide exposure may be a significant risk factor for childhood leukemia.