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  1. Math

    A Fibonacci Fountain

    The year 1202 saw the publication of one of the most famous and influential books in mathematics. Widely copied and imitated, Liber abaci introduced the use of Arabic numerals and the Hindu-Arabic place-valued decimal system into Europe. It was written by Leonardo Pisano, who became better known by his nickname Fibonacci. Helaman Ferguson’s Fibonacci Fountain. […]

    By Ivars Peterson

  2. Long live the Y?

    Researchers have identified a means by which the Y chromosome may forestall, or at least delay, the gradual degradation that some biologists argue will ultimately delete it from the human genome.

    By John Travis

  3. Bacterial diet quiets worm genes

    Genetically engineered bacteria help biologists turn off worm genes.