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In 1997, the United States' National Oceanic and Atmospheric Administration witnessed the loudest underwater sound ever recorded by humans. Since then, the minute-long, low-frequency sound has remained an unsolvable mystery. The so-called ‘bloop’ rumbled louder than a blue whale ever could, but authorities had no idea where it came from - it was too overpowering to match any current living creature - or at least, one that we knew of. Experts and the general public threw out all kinds of ideas - megalodon, an aquatic dinosaur, you name it - but it could only point to one thing: something underwater was moving around, something authorities had never seen before. Signs pointed to giant, undiscovered sea creatures, but years later, we’re finally able to solve the puzzle.
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