On December 12th, 2023, Day 19 of Season 99 of LearnedLeague, we learned of an invention that was first created by French physicist Jean-Augustin Fresnel for use in a specific type of building. I Later Learned more about the enduring history of lighthouses, the buildings that housed the Fresnel lenses debatably saved a million ships, and, while growing less nautically necessary, continue to endure as metaphors. Thank you for listening! Please subscribe on your favorite audio apps like Apple and Spotify, leave reviews, and tell your friends and join the conversation on the message boards! And if you like the show you can support by pre-ordering Ben's book about Naomi Osaka before it comes out next month!