How the Earth Was Made

Great Lakes

E7    Mar 23, 2009    45m    TV-G
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.
Where to Watch Great Lakes
Cast of Great Lakes
  • Corey JohnsonSelf - Narrator
 
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