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The very first ship on the upper Great Lakes, LaSalle's Griffon, sailed only a single voyage before disappearing beneath the waves. Since then several thousand vessels, along with their crews, have met the same fate. Today, these underwater treasures offer historians, archaeologists and scientists a trove of well-preserved time capsules to be studied and protected. This adventurous presentation offers great photographs and underwater video that examine the Great Lakes' underwater treasures.
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