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  1. Two-handed protein may protect DNA

    An unusually shaped protein may help a bacterium thrive in tough times.

    By John Travis
  2. Health & Medicine

    Celiac disease affects kids’ minds

    Attention deficits and learning disabilities have joined the list of neurological problems associated with the intestinal disorder known as celiac disease.

    By Ben Harder

  3. Neurons take charge to change messages

    Neurons in a developing embryo respond to changes in their electrical activity by altering the types of chemical messengers that they produce.

    By Bruce Bower
  4. Planetary Science

    Cometary encounter

    Planetary scientists are feasting on close-up images of Comet Wild 2 as well as on the first information about its composition.