News

  1. Chemistry

    New champions among corrosive microbes

    Newly discovered strains of bacteria have developed a metabolic shortcut for eating away iron with great efficiency.

    By Alexandra Goho
  2. Materials Science

    Cinching nanotubes into tough fibers

    Irradiating bundles of carbon nanotubes can lead to tougher fibers.

    By Alexandra Goho
  3. Physics

    Radioactive sprinkles keep machines true

    Needing tiny radioactive sources to calibrate medical scanners with ever-sharper vision, an Australian team dipped tiny balls the size of candy sprinkles into a radioactive liquid.

    By Peter Weiss
  4. Earth

    Lowering the Boom? Impact crater may predate extinction of the dinosaurs

    Analyses of sediments from the Yucatán in Mexico suggest that an extraterrestrial impact there more than 65 million years ago actually happened about 300,000 years before mass extinctions of dinosaurs occurred.