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  1. Astronomy

    Revved-Up Universe

    Astronomers are busy testing the seemingly bizarre notion that the expansion of the universe is accelerating.

    By Ron Cowen

  2. Keeping Bugs from Pumping Drugs

    Researchers hope that attacking the machinery some microbes use to pump antimicrobial agents out of their cells may help deal with the increasing problem of drug resistance.

    By Damaris Christensen
  3. Health & Medicine

    Researchers Probe Cell-Phone Effects

    Scientists are trying to find out whether biological changes associated with cell-phone use represent health risks.

    By Janet Raloff

  4. Drugs order bacteria to commit suicide

    Seeking to explain how antibiotics work, scientists find a protein that commands bacteria to kill themselves.