Bugün öğrendim ki: Devrimci savaş döneminde kullanılan bir denizaltı olan Kaplumbağa, elektriğin yaygın olarak kullanılmasından önceki bir dönemde derinlik ölçer gibi şeyleri aydınlatmak için ışıldayan mantar kullandı.

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Three views of the American Turtle. [Henry L. Abbot/Library of Congress](https://www.loc.gov/resource/cph.3c10384/) Early on the morning of September 7, 1776, an American soldier named Ezra Lee quietly approached the enemy. The HMS _Eagle_ , a 64-gun British warship moored in New York Harbor, was Lee's target. His goal was to fix three time- delayed explosives to its side. The task required nerves of steel: “When I rowed under the stern of the ship,” he [later wrote](https://www.history.navy.mil/research/library/online-reading- room/title-list -alphabetically/s/submarine-turtle-naval-documents.html