Question

what is in the bottom of ocean??

Answer 1

Researchers used a titanium-encased microphone, or hydrophone, to detect sound waves more than 36,000 feet beneath the surface of the Pacific Ocean, in the Challenger Deep seabed at the bottom of the Mariana Trench near Guam

Answer 2

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Researchers used a titanium-encased microphone, or hydrophone, to detect sound waves more than 36,000 feet beneath the surface of the Pacific Ocean, in the Challenger Deep seabed at the bottom of the Mariana Trench near Guam.