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Deepest Dive: Geographic Honors Voyage to the Bottom of the Sea

By Ford Cochran Fifty years ago–January 23, 1960–Don Walsh, then a U.S. Navy lieutenant, and Swiss oceanographer Jacques Piccard climbed inside a sphere at the bottom of the “bathyscaphe” (deep-diving research submarine) Trieste and descended some 35,800 feet to the deepest place in any ocean on our planet, Challenger Deep in the Mariana Trench off…