Niagara Falls : raging rapids

2011, eVideo , 1 online resource (1 video file (approximately 55 min.)) :
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Summary/Review: Now, in an inspiring video event, we probe the secrets of Niagara Falls. From helicopter and speedboat, at high-tech labs and at rope's end, we join E more...
Summary/Review: Now, in an inspiring video event, we probe the secrets of Niagara Falls. From helicopter and speedboat, at high-tech labs and at rope's end, we join Earth scientists as they struggle to piece together the epic life story of North America's most celebrated natural wonder.
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