Nature

Ocean Giants: Voices of the Sea

Season 30 Episode 10 | 49m 38s

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: 04/09/12 | Expires: 12/19/15

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