Saglana Salchak recently celebrated her fifth birthday. [Photo by Yury Darbaa/Siberian Times] Most preschoolers struggle to go to school on their own, let alone trek 5 miles (8 kilometers) of snowfield packed with wolves in subzero temperature in Siberia. However, a four-year-old girl Saglana Salchak in Russia’s Tuva republic did just that last month to fetch…