News

  1. Anthropology

    South African find gets younger

    The partial skeleton of a human ancestor previously found in South Africa dates to about 2.2 million years ago, roughly 1 million years younger than the original estimates.

    By Bruce Bower
  2. Earth

    Pesticides mimic estrogen in shellfish

    Two common water pollutants can function in shellfish as estrogen does, but they have different behavioral effects on two species.

    By Janet Raloff
  3. Astronomy

    The magnetic link between star and planet

    Astronomers have for the first time directly measured the magnetic field of a star known to host a giant planet.

    By Ron Cowen
  4. Tech

    A nano–cheese slicer

    Stringing a carbon nanotube between two needles yields a nanoscale cheese knife that could improve slicing of biological samples.