News

  1. Brain development disturbed in autism

    A brain-imaging study suggests that autism is characterized by disturbances in the development of the amygdala and the hippocampus, two inner-brain structures.

    By Bruce Bower
  2. Paleontology

    Early life forms had a modular structure

    Fossils recently discovered in northeastern Newfoundland reveal that some of Earth's earliest large organisms had modular body plans whose main architectural element was a branching, frondlike structure.

    By Sid Perkins
  3. Health & Medicine

    Dentists: Eschew chewing aspirin

    Chewing aspirin or just letting the tablets dissolve in the mouth can seriously damage teeth.

    By Nathan Seppa
  4. Earth

    PCBs can taint building caulk

    Long-banned, toxic polychlorinated biphenyls in some building caulk applied in the 1960s and 1970s may still pose an exposure risk.