Uncategorized

  1. Math

    Waves of Congestion

    You’re confined to a single lane as you drive along a narrow, winding road. The car in front of you suddenly slows, then just as inexplicably accelerates a short time later, only to slow again. As you keep adjusting to the leading car’s erratic speed changes, you sometimes find a clump of vehicles closely tailing […]

    By Ivars Peterson
  2. Chemistry

    Novel material fights against cavities

    A new material that dentists might eventually put under fillings and braces secretes calcium and phosphate ions to rebuild teeth as cavities form.

    By Jessica Gorman
  3. Chemistry

    Argon keeps chips and lettuce crisp

    A new technique replaces the air in food packages with argon instead of widely used nitrogen, improving taste and shelf life.