剧情简介
<span style="color: rgb(102, 102, 102); font-family: "Helvetica Neue", STHeiti, 微软雅黑, "Microsoft YaHei", Helvetica, Arial, sans-serif; font-size: 14px; line-height: 19.6px; background-color: rgb(248, 248, 248);">In this episode, biologist Patrick Aryee travels across the Americas to explore the vital role big animals play in their habitats. From Alaska to Patagonia, he comes face to face with grizzly bears, sperm whales and elephant seals to reveal how these giants are shaping their environments – and even helping to reduce climate change.</span><br />
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