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Inside the Fortress
1m 17s
Admiralty Island hosts the largest concentration of brown bears in the world.
NATURE brings the beauty and wonder of the natural world into your home, becoming in the process the benchmark for natural history programs.
Video description: With severe myopia hindering her vision on land, scientist Mary Power's love for aquatic life began when she realized she could see much better underwater. The refraction of the water in her snorkeling mask allowed her to see clearly for the very first time.