He hymns the magic of snow. It liberates our senses, turning a familiar landscape into fantastic sculptures. It cleans the air, because ice crystals bind with dust particles before they freeze, so we breathe more freely. It muffles sounds, so that we sleep more deeply and our other senses become keener — the diamond clarity of light, the tactile alert of ice against skin. Holes in snow have a bluish shimmer because compressed snow crystals absorb red and yellow light more strongly than blue. Some people believe snow has a special smell, like ozone. Each snowflake is a marvel of design. Henry David Thoreau, who often walked through snow in the Walden woods, said that he could not feel more wonder if a star fell and landed on his coat.