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Legendary oceanographer Sylvia Earle and a cast of pioneering marine scientists tell the story of the incredible work being undertaken across the planet to protect the fragile ecosystem of our oceans. Perpetual Planet: Heroes of the Oceans is a showcase of the wonder of the sea, of the living laboratory we all live in and of the vital science being carried out beneath the waves...。During WWII, a platoon of American soldiers trudge through the Italian countryside in search of a bridge they have been ordered to blow up, encountering danger and destruction along the way.。