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  1. Health & Medicine

    Two studies offer some cell-phone cautions

    A British review of research gave cell-phone safety a guarded endorsement, while new findings indicate that radiation from older cell phones can trigger a stress-response gene, at least in animals.

    By Janet Raloff
  2. Health & Medicine

    Drug combination may fight breast cancer

    Retinoic acid, when combined with a drug that reverses a process called methylation in breast tumor cells, may awaken a key cancer-fighting gene.

    By Nathan Seppa
  3. Astronomy

    Astronomers rediscover long-lost asteroid

    After 89 years of playing a cosmic version of Where's Waldo?, astronomers have located a long-lost asteroid named Albert.

    By Ron Cowen
  4. Earth

    Prescribed fire burns out of control

    A fire set by the National Park Service to clear underbrush burned out of control, consuming more than 44,000 acres around Los Alamos, N.M.