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  1. Tech

    Reinventing the Yo-Yo

    No longer simple toys, today's pricey yo-yos sport high-tech features—such as ball bearing transaxles and precision string-snagging mechanisms—that permit dazzling new styles and complex tricks.

    By Peter Weiss
  2. Astronomy

    Shades of Venus

    On June 8, for the first time in 122 years, the silhouette of Venus will move across the face of the sun.

    By Ron Cowen
  3. Math

    From Number Puzzles to Automata

    A high school student plays with numbers and does an award-winning project elucidating the link between automata and divisibility.

    By Ivars Peterson
  4. Humans

    Letters from the April 10, 2004, issue of Science News

    Inaction verbs? Regarding “The Brain’s Word Act: Reading verbs revs up motor cortex areas” (SN: 2/7/04, p.