News

  1. Physics

    Bar codes could be next to check out

    New radio frequency tags would use nanotechnology to identify and track products.

    By Lisa Grossman
  2. Health & Medicine

    Existing antibiotic might help keep wraps on AIDS virus

    The acne drug minocycline inhibits HIV activation in infected immune cells, lab tests show.

    By Nathan Seppa
  3. Paleontology

    Tyrannosaurs lived in the Southern Hemisphere, too

    Australian fossils suggest the kin of T. rex dispersed globally 110 million years ago.

    By Sid Perkins
  4. Chemistry

    Building a cheaper catalyst

    Using perovskite instead of platinum in catalytic converters could shave many hundreds of dollars off the cost of a diesel car.