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الموسم 1، الحلقة 6: 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 · 6 مايو 2019 · 45 دقائق