News

  1. Tech

    Silicon goes optical

    The advent of a fast, light-manipulating microdevice made from silicon suggests that speedy optical-fiber links now too expensive for broad use in businesses and homes may soon become widespread.

    By Peter Weiss
  2. Health & Medicine

    Quantum sentinels

    Quantum physics may soon help physicians track whether a cancer has spread.

    By Erica Klarreich
  3. Health & Medicine

    Gene transfer puts good fats in mammals

    Scientists have used a worm gene to genetically engineer mice whose tissues are unusually rich in the heart-healthy fats found mainly in fish.

    By Ben Harder
  4. Astronomy

    Pulsar pas de deux

    Astronomers have for the first time discovered two pulsars orbiting each other, offering the chance for new precision tests of Einstein's theory of general relativity.