Among the world’s harrowing marine survival stories, the strangest might be a crew’s escape from one of the earliest submarines. It was 1851, and the 26-foot-long sub, designed and captained by a Prussian carpenter, was powered by a couple sailors spinning treadwheels. When the vessel floundered during a trial run and began sinking to the bottom of a German harbor, there was only one very frightening way to get out alive—which is why the crew got into what was almost certainly the first-ever underwater fistfight.

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