For several days last week, Bismarck-Mandan and the surrounding area was treated to a spectacular show of Mother Nature's beauty in the middle of another harsh winter season.A sparkling blanket of hoarfrost covered trees, bushes, grass and most any object exposed to the cold, humid air with delicate ice crystals. The display turned bare, dormant trees and earth-toned grasses of the stark prairie into a pristine magical environment. To wander through the frost-covered surroundings is a chance to appreciate the softer, more fragile side of winter — which is not letting up any time soon. Colder-than-normal temperatures are being forecasted for the first week of February, according to the National Weather Service in Bismarck.