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  1. Life

    It’s the network, stupid

    The complexity of humans may lie not in genes but in the web of interactions among the proteins they make.

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  2. Earth

    Emissions head north

    When it comes to Arctic air, various regions of the Northern Hemisphere are equal opportunity polluters. Even some subtropical countries in southern Asia get into the act.

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  3. Physics

    John Wheeler (1911-2008)

    SN Editor in Chief Tom Siegfried remembers the late physicist John Wheeler, who coined the term "black hole" in 1967, with excerpts from conversations the two had engaged in over the past two decades.

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  4. Humans

    Future scientists

    More than 1,500 high school students will gather in Atlanta to flex their mental muscles at the 2008 Intel International Science and Engineering Fair.