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  1. Earth Image

    Presented by the Universities Space Research Association, this Web site features a new photo, graphic, or illustration every day. Each one deals with an aspect of earth science. Captions provide information about the images and links to related Web material. The archive, dating back to September 2000, includes images of atmospheric phenomena, unusual cloud formations, […]

    By Science News

  2. It’s Time! Fetal lungs tell mom when to deliver baby

    The maturing lungs of a fetus may signal the mother when it's time for labor.

    By John Travis

  3. 19398

    In this article, the thesis is that wolves hunt in packs because they lose less of a carcass to ravens (37 percent loss per pair versus 17 percent loss per pack).