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  1. Humans

    Letters

    Letters from the Jan. 3, 2004, issue of Science News.

    By Science News
  2. Planetary Science

    Journey to Mars

    The rugged Mars Exploration Rover (MER) is scheduled to land on Mars on Jan. 4, 2004. A variety of Web sites offer information about the exploration of Mars and Mars rovers. Check out the official MER Web site for background information and up-to-the-minute reports. San Francisco’s Exploratorium Web site highlights various Mars-related activities. Go to: […]

    By Science News
  3. Earth

    New technique dates glaze on desert rocks

    Scientists have developed a quick, easy, portable, and nondestructive way to determine the age of desert varnish, the mysterious dark coating that slowly develops on rocks in many arid regions of the world.