News

  1. 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
  2. Health & Medicine

    Dentists: Eschew chewing aspirin

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

    By Nathan Seppa
  3. 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.

    By Janet Raloff
  4. Health & Medicine

    Birthing age and ovarian cancer risk

    Giving birth confers on women some protection against ovarian cancer, and the later in life the last pregnancy happens, the better the protection.