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  1. 19752

    One solution to global warming suggested in the article is stretching Mylar across the ground. How about designing reflective concrete to aid in this endeavor? We are already covering a large amount of Earth with pavement. Tom E. KlassenIndianapolis, Ind.

    By Science News
  2. Ecosystems

    Worthless waters

    The biological riches of the oceans will be spent within decades if current trends continue.

    By Ben Harder
  3. Astronomy

    Web Special: Hubble Repair Mission Is a Go

    After several years of uncertainty following the Columbia shuttle disaster, NASA this week gave the go-ahead for a shuttle crew to replace and repair parts on the 16-year-old Hubble Space Telescope.

    By Ron Cowen
  4. Math

    Designer Decimals

    Fractions can yield amazingly familiar decimal expansions.