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Some animal species congregate in huge groups. Icelandic puffins form colonies of more than a million, which provides shared information about food sources and reduces the odds of being attacked. Social spiders in Ecuador gather by the thousands to capture large prey. Leaf cutter ants in Costa Rica build enormous acre-wide cities to house multimillion-citizen colonies.
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54:19
It's one of the most brutal environments on Earth - so how does life carry on here?
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54:24
Efforts to rescue the thousands of household pets left homeless by Hurricane Katrina.
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52:58
NATURE visits one of the world's most spectacular aquariums.
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54:06
Hawaii is a place of beauty. It is also a land of volcanoes, blizzards, and rockslides.
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54:32
After a decades-long comeback, grizzly bears appear to be thriving.
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54:07
Filmmakers take a dive of a lifetime to learn about the location's fantastic creatures.
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53:17
In 1995, while filming wild horses in the mountains of Montana, Ginger Kathrens discovered
