News

  1. Life

    Small number of genes trigger embryo development

    New views of early embryo development reveal differences between humans and mice.

    By Tina Hesman Saey
  2. Oceans

    Earth got first whiff of oxygen 3.2 billion years ago

    Photosynthesis by early cyanobacteria pumped oxygen into Earth’s oceans 200 million years earlier than once thought, new geochemical analyses show.

    By Thomas Sumner
  3. Environment

    Molting seals shed mercury along with fur

    Seals spew amassed mercury when they shed, creating hotbeds of pollution in otherwise pristine coastal environments.

    By Beth Mole
  4. Materials Science

    Graphene shows signs of superconductivity

    Ultrathin sheets of carbon can conduct electrical current with no resistance at low temperatures.