The purple light of dawn glows in the morning sky above Mount Moran at Grand Teton National Park in Wyoming. The winter air is cold and fresh as frost and snow cover this gorgeous landscape. Less than 10 million years old, the Tetons are one of the youngest mountain ranges in North America. In that time, Mount Moran has risen 6,000 feet above the valley and supported the creation of Falling Ice and Skillet glaciers. Photo courtesy of Daniel Ewert.