在以下頻道推出： Disney+
第 1 季，第 6 集: Step inside the most frigid habitats on Earth — the poles. Here, the planet’s ultimate survivalists include whale-hunting polar bears, leopard-seal-dodging penguins and a pack of Arctic wolves that can bring down a pair of musk oxen. Evolution has helped polar species combat the intense hostility of their habitats, but their world is changing rapidly and their resilience will be tested.
Reality · 2019年5月6日 · 45 分鐘