Uncategorized

  1. Math

    Art of Pursuit

    The simple mathematical concept of a pursuit curve can serve as the starting point for creating wonderfully intricate artistic designs. Four “bugs” chasing one another produce an intriguing pattern of nested, rotated squares. Courtesy of John Sharp. Pursuit curves based on a star-shaped polygon. Courtesy of John Sharp. Example of a pattern in which the […]

    By Ivars Peterson
  2. Health & Medicine

    Ebola May Enter Cell via Folate Gate

    A cell-surface molecule that normally binds to folate might be targeted by Ebola and Marburg viruses as their entry point to people's cells.

    By Nathan Seppa
  3. Earth

    Power Harvests

    Farmers are finding that commercial wind power is the best new commodity to come along in years, one that can offer substantial year-round income.