What Was The Sound Heard Deep In The Mariana Trench?

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In 2014, an autonomous robot sent to the deepest place on Earth—the Mariana Trench—picked up a strange, warbling call from the murky dark. It was a puzzle straight out of H.P. Lovecraft, but a team of marine bioacoustics researchers has announced that they may have finally found an answer that doesn't involve giant underwater monsters—at least, none that we haven't heard of before.

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The Mysterious Sound In The Mariana Trench

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