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Nature
African Wild Dogs Vote with Sneezes
How does a pack of African wild dogs make the decision that it is time to hunt? One study found that packs vote on a hunt by sneezing.
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52:42
Rangers at Denali National Park train hikers for planned encounters with grizzlies bears.
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56:16
Fire and the Yellowstone National Park ecosystem
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56:08
Fur trade continues to threaten the otter, despite its status as an endangered species
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56:34
River from Rockies to near Sea of Cortez
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54:50
Hugh Miles films Europe's great birds of prey and notes how man's actions endanger them
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55:11
Hong Kong: English Crown Colony history
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54:53
Emmy-winning filmmaker Hugh Miles presents a lyrical portrait of Scotland's Caledonian For
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56:43
Life in Antarctica-penguin, seals, corals.
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57:17
Brazilian primates face extinction.
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56:39
Sharks, rays, squids and blue whales live in Pacific waters off the California coast.
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55:38
Tepuyes, Venezuelan monoliths, Roriama and Chimanta
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49:46
Adelie penguin, volcanic Ross Island, South Pole