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The deepest-diving submarine

Fifty years ago, a two-man crew aboard the Trieste descended to the deepest surveyed point of the Pacific Ocean, a hole in the Mariana Trench. They are the only two people to have been to the gorge in the ocean floor, known as Challenger Deep, which is 35,800 feet below the surface. They descended inside a sphere that hung below a 60-foot-wide chamber filled with gasoline, water and iron pellets.

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Out of the depths, into the spotlight
Article | The sunlight began to fade a few hundred feet down. Shades of gray turned to black. The steel structure groaned as the water pressure increased, and the Trieste sank toward the fabled gorge in the Pacific Ocean floor known as Challenger Deep.

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