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　　Explores the grit and glory in the wilds of North America, Central America and South America. 　　Outside our concrete jungles, beyond the strip malls, and just minutes from our own backyard is another world that is thriving, fighting, and surviving. Brawny mountains, burning deserts, tangled forests, and curvaceous coasts. A grizzly bear takedown of helpless elk calves in Yellowst... (展开全部)