Uncategorized

  1. Archaeology

    Openings to the Underworld

    Archaeological finds indicate that ancient groups in Mexico and Central America, including the Maya, held beliefs about a sacred landscape that focused on natural and human-made caves as sites of important ritual activities and burials.

    By Bruce Bower
  2. Health & Medicine

    D-fending the Colon: Bile component triggers vitamin D receptor

    The protein that enables cells to respond to vitamin D also helps the gastrointestinal tract protect itself from an especially dangerous acid in bile.

    By John Travis
  3. Tech

    Live Tour: Joystick journeys reveal tumor interiors

    A new holographic technique may someday enable doctors to skip certain biopsies and choose instead to take video excursions inside suspicious growths in skin or internal body linings.