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Excerpt from medium.com
At a depth more than 10,000 m underwater, the pressure increases to an extreme level (≈ 1,086 bar or 8 tons per square inch) and the water temperature becomes freezing (≈ 1 to 4℃).
Despite of these extreme conditions blocking human reach, our endless curiosity has propelled expeditions to the deep sea — to unveil the mysteries lying in the bottom of the ocean.