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  1. Health & Medicine

    Stem-cell transplant works on lupus

    Severe lupus can be reversed with a transplant of the patient's own bone marrow stem cells, after they're allowed to mature outside the body, and medication that neutralizes self-attacking immune cells.

    By Nathan Seppa
  2. Astronomy

    Ulysses makes a return trip

    Just as the sun has reached the stormy peak of its 11-year activity cycle, the European Space Agency's Ulysses spacecraft has begun its second and final pass over the sun's poles.

    By Ron Cowen
  3. Astronomy

    Magnetic-mapping mission resurrected

    The European Space Agency successfully launched Cluster II, a group of four spacecraft that will fly in tandem to generate a three-dimensional map of Earth's magnetosphere.