Uncategorized

  1. Earth

    Solving Hazy Mysteries

    Aerosols such as smoke, soot, and sea spray make for hazy vistas and stunning sunrises, but they also play major roles in Earth's climate and atmospheric chemistry.

    By Sid Perkins
  2. Health & Medicine

    Food Forays

    Ever wonder what the Vikings ate on their lengthy voyages to new lands? What pioneers cooked on their treks along the Oregon Trail? Who invented the potato chip? The fascinating answers to these and many other food-related questions can be found at the Food Timeline, a collection of links to related Web pages, compiled by […]

    By Science News
  3. Health & Medicine

    Natural fluoride isn’t quite enough

    In the absence of a public water-fluoridation program in eastern Germany, natural background concentrations of fluoride in drinking water affect children’s dental health.