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  1. Earth

    On Shifting Ground

    In earthquake-prone areas of the United States and elsewhere in the world, debates go on over whether—and how much—to reinforce buildings.

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  2. Humans

    From the August 19, 1933, issue

    CONSTRUCTION BEGUN ON 80-INCH TEXAS TELESCOPE The giant 80-inch reflecting telescope that will spy upon the stars from McDonald Observatory, to be erected on a peak of Davis Mountains, Texas, is now under construction. A contract for the telescope has been approved by the University of Texas board of regents, and Warner and Swasey Company […]

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  3. Planetary Science

    Mars Encounter

    On Aug. 27, Mars and Earth will be closer to each other than at any other time in the last 50,000 years.