In 1997, hydrophones in the Pacific picked up a sound so loud it could be heard over 5,000 kilometers away. Known as “The Bloop,” this mysterious underwater noise remains one of the strangest and most ...

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The “Bloop” sound had people convinced something huge was hunting in the ocean — like a real-life sea monster hiding in the deep. This video breaks down what the Bloop actually was, why it sounded so ...