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...。卡琳娜(Carina)与家人一起度过了传统的瑞典仲夏节,但当隐藏已久的秘密开始曝光时,这个欢乐的时刻却出现了问题。。