Uncategorized

  1. Physics

    Seeming sedate, some solid surfaces seethe

    Although they're as orderly as bathroom-floor tiles, surface atoms of copper--and perhaps other solids--actually roam randomly and widely within their grid.

    By Peter Weiss
  2. Health & Medicine

    Color array reveals breast cancer types

    A suite of genes lights up when researchers probe for cancer.

    By Jessa Netting
  3. Health & Medicine

    Sometimes an antibiotic is much more

    By reining in destructive enzymes in the body, tetracyclines can thwart various diseases, including periodontal bone loss and cancer.

    By Janet Raloff
  4. Paleontology

    Extinctions Tied to Impact from Space

    Evidence trapped in 250-million-year-old sediments may help researchers pin the ultimate blame for the massive extinctions that occurred then on the impact of an extraterrestrial object about 9 kilometers across.