Ocean Giants: Voices of the Sea

Season 30 Episode 10 | 49m 38s | Video has closed captioning.

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.

Aired: 04/10/12

Expired: 12/19/15

Rating: NR

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Major support for NATURE is provided by The Arnhold Family in memory of Henry and Clarisse Arnhold, The Fairweather Foundation, Kate W. Cassidy Foundation, Charles Rosenblum, Kathy Chiao and Ken …

Major support for NATURE is provided by The Arnhold Family in memory of Henry and Clarisse Arnhold, The Fairweather Foundation, Kate W. Cassidy Foundation, Charles Rosenblum, Kathy Chiao and Ken Hao, Sue and Edgar Wachenheim III, Filomen M. D’Agostino Foundation, Lillian Goldman Charitable Trust, Gregg Peters Monsees Foundation, Koo and Patricia Yuen, Sandra Atlas Bass, The Hite Foundation, Sarah and Sandra Lyu in memory of Seung and Dorothy Lyu, Bradley L. Goldberg Family Foundation, Arlene and Milton D. Berkman, by the Corporation for Public Broadcasting and by Viewers Like You.