How the earth was made: 7- Great lakes

Science documentary
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Link to How the earth was made: 7- Great lakes documentary

Documentary Description

Scientists seek clues to the formation of North America's Great Lakes, the largest expanse of fresh water on the planet; delving into an underground salt mine; investigating a fossilized coral reef; diving to the bottom of Lake Superior.

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Category: Science Documentaries
Documentary title: How the earth was made: 7- Great lakes
Documentary Category: Science
Documentary Views: 823
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