Glaciers: Alaska's Rivers of Ice: They’re one of Earth’s greatest phenomenon – mountains of ice floating freely in our oceans. From the shattering roar of calving tidewater glaciers to the frigid world of the tiny ice worms, join the US Geological Survey as they explore the... (more details for Glaciers: Alaska's Rivers of Ice)

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File by Jay M Towsend (#2093)
2012-05-22 Grade: 9-10