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What if the loudest mysterious sound ever recorded on Earth… came from something we’ve never seen? In 1997, scientists monitoring the Pacific Ocean detected a strange signal. It was powerful. Extremely loud. And it came from somewhere deep beneath the water. The sound was picked up by underwat…

What if the loudest mysterious sound ever recorded on Earth… came from something we’ve never seen? In 1997, scientists monitoring the Pacific Ocean detected a strange signal. It was powerful. Extremely loud. And it came from somewhere deep beneath the water. The sound was picked up by underwater microphones placed thousands of kilometers apart. That meant one thing. Whatever made it… was enormous. Researchers nicknamed the signal “The Bloop.”