Humpback whales' songs carry thousands of miles, while a sperm whale scans the ocean depths with a sonar laser beam louder than a thunderclap. "Voices of the Sea" reveals a surprising underwater world where sound takes the place of sight. 4/11/2012Premiere Date: April 11, 2012 | Runtime: 00:00:30
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NATURE brings the beauty and wonder of the natural world into your home, becoming in the process the benchmark of natural history programs.