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Nature : Frogs: The Thin Green Line

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Scientists try to save populations of frogs, as large-scale die-offs of the amphibian continue around the world.

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Previous Episode

Kilauea: Mountain of Fire

(First Aired: March 29, 2009)

Kilauea, on Hawaii's Big Island, is an active volcano that has created 544 acres of new land and has consumed 200 homes.

Next Episode

The Loneliest Animals

(First Aired: April 19, 2009)

Intensive captive breeding programs aim to sustain endangered species and return them to the wild.