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The spring thaw on the northwest coast of Alaska brings birds, whales and walruses back from their winter migration.
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Capts. Johnathan and Andy Hillstrand from "Deadliest Catch" begin an Alaskan adventure to search for answers to the mysteries of the Bering Sea monster and the legendary Cadborosaurus.
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One of the biggest and rarest, living reptiles on earth, the black caiman.
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The stark appearance of Canyonlands conceals life in unexpected places.
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Cougars struggle for survival in the northern Rocky Mountains.
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