News

  1. Health & Medicine

    CT scan no match for colonoscopy

    Colonoscopy is better at detecting potentially dangerous colon polyps than computed tomography scanning is.

    By Nathan Seppa
  2. Planetary Science

    Rovers in overtime

    NASA has extended the missions of the twin Mars rovers by 5 months, through September 2004.

    By Ron Cowen
  3. Earth

    Prenatal exposures affect sperm later

    Boys exposed in the womb to hormone-mimicking pollutants may mature into men who produce impaired sperm.

    By Janet Raloff
  4. Earth

    Toxic color TVs and computer monitors

    High concentrations of lead can leach from the X-ray-filtering glass used in picture tubes, suggesting that this glass should be treated as hazardous waste.