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Nature
Preview of Grizzly 399: Queen of the Tetons
Known only by her research number, Grizzly 399 has been a fixture in Grand Teton National Park since 2007, becoming the world’s most famous grizzly bear. Now 399 is raising four new cubs in the face of human encroachment, a warming climate and the threat of losing protection under the Endangered Species Act.
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In northern Kenya, a remarkable conservation experiment is unfolding at Reteti Sanctuary.
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Animal parents must balance risk and reward to raise their young in grasslands.
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Follow the complex lives of giant elephant bulls in Amboseli and Mount Kilimanjaro.
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53:38
Follow a female mountain lion in the Montana mountains over the course of a decade.
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53:41
See how the Arctic’s most enigmatic animals are coping as the sea ice melts.
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Follow a woman’s transformative journey as she nurtures wounded hummingbirds.