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  1. Tech

    Special Delivery: Metallic nanorods shuttle genes

    A new gene therapy technique relies on nanorods made of gold and nickel to deliver genes to cells in the body.

    By Alexandra Goho
  2. Astronomy

    Super Data: Hail the cosmic revolution

    Ten extremely distant supernovas recently discovered by the Hubble Space Telescope provide evidence that something is pushing objects in the cosmos apart at an ever-faster rate.

    By Ron Cowen
  3. Earth

    When Genes Escape

    The focus of the debate over transgenic crops has changed from whether genes will escape to what difference it will make when they do.

    By Susan Milius
  4. Earth

    Scrutinized chemicals linger in atmosphere

    The newly determined longevity in the atmosphere of certain perfluorinated chemicals indicates that they may disperse environmental contamination far and wide.