Glaciers are one of Earth's greatest phenomena - rivers of ice flowing from the mountains, sometimes reaching the oceans. From the white thunder of calving tidewater glaciers to the frigid world of tiny ice worms, join USGS scientists as they investigate and explore the wonders of Alaska's rivers of ice.

Users of the disc will learn about the distribution of the world's glaciers, the formation of glacier ice, the glacier ecosystem, the role glaciers play in global sea level change, the features produced by glacier erosion and deposition, and much, much more!