|Julia Cort||Executive Producer|
|David Dugan||Executive Producer|
|Rob Hartel||Executive Producer|
|Carlo Massarella||Executive Producer|
|Chris Schmidt||Executive Producer|
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Paleontologist Kirk Johnson visits the Grand Canyon and Niagara Falls to explore how various primordial geological forces including volcanoes, earthquakes, floods and glaciers shaped the continent that came to be North America. ~ Tom Ciampoli
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