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The original was posted on /r/todayilearned by /u/Flares117 on 2024-06-23 12:35:38+00:00.

Original Title: TIL: The University of Pennsylvania uncovered illustrations with instructions from the 1500s on the use of cats and doves to burn down castles. You strap a sack to the cat, ignite it, and send it to the castle. The plan was part of a manual by artillery master Franz Helm.