Uncategorized

  1. Animals

    Comeback Bird

    Looking for a long-lost woodpecker had its special challenges, including anticipating what would happen if the hunt actually succeeded.

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  2. Math

    Knot an Interchange

    Highway interchanges can get you into knotty situations.

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  3. Humans

    From the June 1, 1935, issue

    High-voltage circuit breakers, harnessing tides for electric power, and confirming the existence of the Sargasso Sea.

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  4. Earth

    Sustainable Resource Use

    This British Web site provides educational material about the sustainable use of resources, including water, waste management, textiles, and timber. It provides puzzles, experiments, worksheets, and lesson plans, with links to a wide range of environmental information.