Documentary Educational: Investigating the Mysteries of North America's Great Lakes

Documentary Educational: Investigating the Mysteries of North America's Great Lakes - An incredible natural resource, about 20% or 1/5th of the world's drinking water is stored in them They hold enough water to flood continental America 9 feet deep. How did such vast bodies form on Earth? Glaciers. Meteors. Weather Systems. Water levels rising and falling. Water flow changed from south to east.

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