News

  1. Health & Medicine

    Hepatitis B link to cancer is clarified

    A kind of hepatitis B called genotype C is more likely to lead to liver cancer than are other genotypes of the hepatitis virus.

    By Nathan Seppa
  2. Tech

    Silicon chips land a lasting laser

    The first microchip-size silicon lasers promise to boost the maximum speeds of ordinary computers and electronic gadgets.

    By Peter Weiss
  3. Tech

    Remembering, on the cheap

    A new type of cheap plastic memory bit that stays set even when electrical power is off could facilitate the spread of flexible, radio-equipped tags as price tags, identity labels, and surveillance sensors.

    By Peter Weiss
  4. Health & Medicine

    Tungsten-alloy shrapnel might cause cancer

    Wounds caused by shrapnel comprising tungsten alloyed with nickel and cobalt cause cancer in rats, raising questions about the wisdom of using tungsten in munitions.