S1 E6 Drain the Great Lakes

CGI drains the Great Lakes, the world's largest system of free fresh water, to reveal hidden secrets of the continent's history and geological past.... More

Drain the Oceans: Best Of Episodes (6)

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S1 E6 Drain the Great Lakes
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S1 E5 Drain the Ocean
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S1 E4 Drain The Ocean: WWII
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S1 E3 Drain the Titanic