On Monday, it emerged that one of the missing submersible’s passengers is U.K. billionaire Hamish Harding.
, and four times deeper than the lowest depth ever reached by a conventional U.S. Navy submarine. Merely descending to the wreck takes about two hours.It wasn’t until after the Second World War that marine technologists — most notably the French oceanographer Jacques Cousteau — were able to pioneer the development of submersibles that could reach the bottom of the mid-Atlantic without getting crushed.
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