Who was the first crazy person to experiment with going into a submarine—and how did people figure out how to get it right? The Science of Survival series, from Outside Magazine and PRX, explores how people get through impossible situations: being frozen alive, getting struck by lightning, going without water for a week. Listen to this installment to hear about John Day, an English carpenter who built the first submarine on record in 1774, and Bavarian engineer Wilhelm Bauer, who had to win an undersea fistfight to save his crew.