Uncategorized

  1. Anthropology

    Evolutionary Back Story: Thoroughly modern spine supported human ancestor

    Bones from a spinal column discovered at a nearly 1.8-million-year-old site support the controversial possibility that ancient human ancestors spoke to one another.

    By Bruce Bower

  2. 19675

    I’ve always found difficult the argument that Homo erectus couldn’t speak because of the size of its spinal cord. Consider that parrots manage to reproduce a wide range of human sounds. David PetcheyMill Valley, Calif.

    By Science News
  3. Earth

    Tainted by Cleanser: Antimicrobial agent persists in sludge

    About 76 percent of a commonly used antimicrobial agent exits sewage-treatment plants as a component of the sludge that's often used as a farm fertilizer.