News

  1. Health & Medicine

    Silenced gene may foretell colon cancer

    A cancer-suppressing gene, which is often shut down in colorectal cancer, is sometimes silenced in healthy colorectal tissues as well.

    By Nathan Seppa
  2. Tech

    Getting a charge out of backpacking

    A backpack enhanced with springs, gears, and a generator converts the up-and-down motions of the wearer into enough electricity to power portable electronic gadgets.

    By Peter Weiss
  3. Health & Medicine

    Sharpening the focus of mammograms

    Digital mammography can detect up to one-fourth more cancers than traditional film mammography can in women who are under 50, haven't gone through menopause, or who have dense breast tissue.

    By Nathan Seppa
  4. Earth

    Pack Rat Piles: Rodent rubbish provides ice age thermometer

    Analyses of fossilized plant remnants collected by pack rats reveal that the Grand Canyon was much cooler than previously thought during the latter part of the last ice age.