Only the hardiest animals are capable of carving out a life in Siberia. Over a wild year, polar bears, reindeer, red-crowned cranes, cherry salmon and least weasels must endure a long unforgiving winter and take advantage of the brief abundance of spring. From the ice-covered shores of the north, across miles of barren tundra, to the depths of the taiga forest, these animals must face incredible challenges and fight for survival.