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  1. Astronomy

    Hubble spots North Star companion

    Astronomers have obtained an image of a close companion star to Polaris, the North Star.

    By Ron Cowen
  2. Astronomy

    Gravity at play

    Astronomers have found 19 cosmic mirages, distorted images created when the gravity of a massive galaxy bends and magnifies the light from a background object.

    By Ron Cowen
  3. Materials Science

    Making waves

    Scientists have created thin, wavy silicon ribbons that stretch along with their rubber backing.

    By Aimee Cunningham
  4. Tech

    Cranberry aid for assay

    Cranberry juice, often used to stave off urinary-tract infections caused by Escherichia coli, also keeps the bacterium from reducing a biosensor's specificity.