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  1. Worm life span set by chromosome tips

    For worms, longer chromosome tips mean longer lives.

    By John Travis
  2. Earth

    Global Vineyard

    Recognizing that continued climate change may leave some renowned grape-growing regions too hot or too dry to support vineyards, growers may turn to new technology and techniques to produce consistently better fruit.

    By Sid Perkins
  3. Math

    A Measure of Beauty

    In the 1930s, mathematician G.D. Birkhoff proposed a formula for computing aesthetic value.

    By Ivars Peterson
  4. Humans

    From the May 19, 1934, issue

    Preparing for a stratospheric ascent, the great dust storm of 1934, and the invention of the electron microscope.