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Nature
The Biggest Threat to Bighorn Sheep
Bighorn sheep are quickly depleting in number due to a fatal bacteria that spreads like wildfire among herds. Discover the cause of this epidemic that is threatening this icon of the American west.
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53:33
At Reteti Sanctuary, caretakers prepares to release their oldest orphans into the wild.
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53:33
In northern Kenya, a remarkable conservation experiment is unfolding at Reteti Sanctuary.
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51:54
Animal parents must balance risk and reward to raise their young in grasslands.
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53:24
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.