Uncategorized

  1. 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
  2. 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.

    By Nathan Seppa
  3. Anthropology

    Chimps mature with human ancestor

    The Stone Age human ancestor Homo erectus grew at about the same pace as wild chimpanzees today do.

    By Bruce Bower
  4. Astronomy

    Cassini eyes Iapetus

    Only a few days after it entered orbit around Saturn, the Cassini spacecraft captured an image of Saturn's split- personality moon Iapetus.