News

  1. Earth

    2005 was warmest year on record

    Last year's global average temperature was the warmest since scientists began compiling records in the late 1800s.

    By Sid Perkins
  2. Earth

    Manganese can make water toxic

    Drinking water contaminated with manganese can subtly limit a child's intellectual development.

    By Janet Raloff
  3. Health & Medicine

    Rotavirus vaccines pass big safety tests

    The largest industry-funded medical trials in history have found that two new vaccines are both safe and effective against life-threatening childhood diarrhea caused by rotavirus.

    By Ben Harder
  4. Health & Medicine

    Tumor’s border cells told to leave

    Cells on a tumor's outer layer that touch healthy tissue receive a chemical signal that sends them wandering away.