Uncategorized

  1. Astronomy

    Telescope Tuned Up: Back to work for orbiting observatory

    A rejuvenated Hubble Space Telescope floated away from the space shuttle Columbia on March 9 after astronauts spent a week renovating the observatory.

    By John Pickrell
  2. Health & Medicine

    Stem Cell Success: Mice fuel debate on embryo cloning

    In mouse studies, scientists have used a technique called therapeutic cloning to create personalized replacement tissue.

    By John Travis
  3. Health & Medicine

    Eight hours of sleep may not be so great

    Sleeping 8 to 9 hours a night doesn't necessarily translate into a longer life.

    By Nathan Seppa
  4. Health & Medicine

    Alzheimer’s disease vaccine abandoned

    Safety concerns forced the shelving of tests of an experimental vaccine for Alzheimer's disease.