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  1. Earth

    A Portrait of Pollution: Nation’s fresh water gets a checkup

    Virtually all of America's fresh water is tainted with low concentrations of chemical contaminants, according to a new nationwide study.

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  2. Materials Science

    Branching Out: Semiconducting nanotrees could boost electronics

    Forests of semiconducting nanotrees could form the basis of future solar cells, low-energy lighting, and other optical or microelectronic devices.

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  3. 19421

    Your article failed to include in the list of oldest dogs the Shiba Inu. This is the most popular dog in Japan today, and many of its qualities make it a much better pet than the other dogs listed in your “oldest breeds” category.