News

  1. Doing the DNA shuffle

    DNA near the ends of people's chromosomes shows surprisingly large differences from the corresponding DNA in other great apes.

    By Patrick Barry
  2. Health & Medicine

    Nongene DNA boosts AIDS risk

    People with a newly discovered genetic variation are more vulnerable to HIV infection.

    By Patrick Barry
  3. Humans

    Burdens of knowledge

    Greater understanding of the role of genetics in human diseases presents scientists with ethical dilemmas.

    By Patrick Barry
  4. Health & Medicine

    Salmonella seeks sweets

    A sugarlike substance in the roots of lettuce may attract food-poisoning bacteria.

    By Janet Raloff
  5. Earth

    Groundwater use adds CO2 to the air

    Pumping out groundwater for crop irrigation or industrial purposes releases planet-warming carbon dioxide into the atmosphere.