Is Sonar Killing Marine Animals?

Ships across the planet rely on sonar to safely navigate the world's oceans. This fascinating technology has revolutionized everything from maritime research to international trade and war -- but, somewhere along the way, experts realized sonar might have a hidden price. Listen in to learn more about sonar's effects on marine animals -- and why, for decades, it was the stuff the world's militaries didn't want you to know.

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