Among the world\u2019s harrowing marine survival stories, the strangest might be a crew\u2019s 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\u2014which is why the crew got into what was almost certainly the first-ever underwater fistfight.\nThe\xa0Outside\xa0Podcast\xa0is made possible by Outside+ subscribers. Learn about the many benefits of a subscription and sign up now at\xa0outsideonline.com/podplus.