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  1. Humans

    Nobel prizes honor innovative approaches

    The 2002 Nobel prizes pay tribute to an international sampling of scientists who developed powerful new techniques for expanding the horizons of research.

    By John Travis, Ivars Peterson and Jessica Gorman
  2. Earth

    Lawn Agent Cues Embryo Shortfall: Herbicide weeds out mice in the womb

    Minuscule amounts of over-the-counter weed killers impair reproduction in mice.

    By John Pickrell

  3. 19181

    Reading your article, I was struck with a question: Do the oxen form a psychological attachment to their oxpeckers (and vice versa)? One way of finding this out would be to observe whether the oxpeckers remain attached to one ox or are fickle partners.