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  1. Computing

    Computer grid cracks problem

    A large network of powerful computers solved a 32-year-old optimization challenge known as the "nug30" quadratic assignment problem.

    By Ivars Peterson
  2. Computing

    Strength and weakness in diversity

    Although the Internet's redundancy and diversity help it survive local node malfunctions despite its vast size and complexity, it is vulnerable to attacks aimed specifically at the most highly connected nodes.

    By Ivars Peterson
  3. Health & Medicine

    Antibiotic for Huntington’s disease?

    In mice genetically engineered to develop an illness similar to Huntington's disease, the drug minocycline significantly delays the onset of symptoms and death.

    By John Travis
  4. Health & Medicine

    Microbes implicated in heart disease

    Viruses and bacteria besides chlamydia may play a role in human heart disease through an immune reaction to a heartlike protein they produce.