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| Episode Description |
Wednesday, Jan 16, 2013 - 9:00 PM
"The Surprise Salmon"
In Alaska, North America's highest mountains and most active volcanoes erupt and poison the rivers. Scientists are just beginning to piece together the events of nearly 2,000 years ago when one race of salmon faces the death of its river and is forced back to the open ocean - on an extraordinary adventure. G
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