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  1. Humans

    From the August 12, 1933, issue

    CONTINENTAL LIGHTHOUSE This is a moonlight photograph of the 400-watt electric lamp on the top of Mt. Washington. When flashed recently in visibility tests conducted by the Mt. Washington Polar Year observers, it was noticed as far away as Boothbay Harbor, Maine, 95 miles distant, and at many other points in New England. Current for […]

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  2. Humans

    Alexandria’s Library

    The Library of Alexandria was one of the wonders of the ancient world. Egypt has now rebuilt the library as the Bibliotheca Alexandrina, housed in a new complex in Alexandria. The Web site includes a history of the ancient library, a photo tour of the new facility, links to archaeological investigations of Alexandria, and other […]

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  3. Math

    Running Lanes and Extra Steps

    When going out to your local running track for a workout, you sometimes find that you are allowed to use only certain lanes for training.