HISTORY Talks How The Great Lakes Were Created In New Episode Of “How The Earth Was Made”

The Great Lakes of North America are the largest expanse of fresh water on the planet. Searching for clues of their formation, however can be difficult.

HISTORY’s geologists delve deep into an underground salt mine to search for clues. This made for a captivating Season 1, Episode 7 of “How The Earth Was Made.”

Watch the full episode below.

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