News

  1. Earth

    Manufacturers agree to phase out nonstick chemical

    Complying with a request from the Environmental Protection Agency, the companies that make the likely carcinogen perfluorooctanoic acid (PFOA) have agreed to phase out its release worldwide by 2015.

    By Ben Harder
  2. Anthropology

    Evolution persisted in agricultural era

    Natural selection has continued to propagate survival-enhancing gene variants in human populations over the past 10,000 years, according to a new genetic analysis.

    By Bruce Bower
  3. Plants

    Small difference factored big in rice domestication

    A change in a single letter of a rice plant's genetic code gave it the ability to hold onto grains until harvest.

    By Christen Brownlee
  4. Tech

    Viral building blocks

    Proteins taken from a spherical virus and combined with pieces of DNA can form tubular nanostructures, researchers report.