Great Lakes
How the Earth Was Made · Season 1 · Episode 7
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.
Episode Details
Air date, runtime, timezone, and episode position.
Season
1
Episode
7
Air Date
24/Mar/2009
Air Time
21:00
Runtime
45 min
Overview
Episode summary.
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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