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  1. Earth

    Count Down: Chemicals linked to inferior sperm

    New data suggest that typical exposures to chemicals called phthalates are associated with reduced fertility in men, but the specific phthalates they finger aren't those that researchers most expected to cause problems.

    By Ben Harder
  2. Humans

    From the May 27, 1933, issue

    CRYSTAL WONDERLAND You can see all these things through a microscope, as scientists and laymen have been seeing them for many years. But the way into this Lilliputia of the waters is being made even easier for you through the amazing artistry in glass of a worker at the American Museum of Natural History in […]

    By Science News
  3. Humans

    Ring World

    Ever wonder what it might be like to live on a doughnut-shaped world? NASA has created a Web page that gives you a sense of what life would be like in a ringlike structure out in space, where there is no gravity except the centrifugal force generated by the structure’s spin.