Nature Ocean Giants, "Voices of the Sea" - Preview
Airs Wednesday, April 11, 2012 at 8:00 p.m. ET/PT. Check your local listings. Details
Episode: Ocean Giants, "Voices of the Sea" - Preview
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. 4/11/2012
Premiere Date: 04/11/2012
Episode Expires: Never
TV Rating: NR
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