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The Invention That Saved a Million Ships | Fresnel Lens Lighthouse Tour

In the 1800s, Fresnel lenses transformed lighthouses around the world. After that, they started showing up in everything from headlights... to spacecraft. To learn their story, I spent the day with the lighthouse keeper at Big Bay Point Lighthouse on Michigan's Lake Superior - and learned some pretty incredible things. A special thanks goes to Nick Korstad for his help with this video. Thanks for being a gem and spending an afternoon with me, Nick! ✨ Want to support my work? Well, hey, thank you so much. You can learn more about how to keep this thing going at www.patreon.com/alexisdahl. ☕ Find this series valuable, but Patreon isn't for you? You can also help keep this thing going at www.buymeacoffee.com/alexisdahl. 💡 Want to visit Big Bay Point Lighthouse? Here's their website (transparency note: this video is not sponsored; I just love this place): bigbaylighthouse.com/ Find Me Elsewhere: • On Instagram, I upload a lot of nature photos, plus science and adventure stories: instagram.com/alexis.writes • Want to get semi-monthly e-mails about my latest videos, art sales, and other happenings? You can sign up here: alexisdahl.com/newsletter • Want to work together or learn more about my work? Contact me at AlexisDahl.com. • On Etsy, I sell original artwork and stickers: etsy.com/shop/AlexisJDahl • On Twitter, I occasionally share science news and the occasional thought: twitter.com/alexiswrites For more information on Big Bay Point Lighthouse, Fresnel lenses, NASA's Deep Space 1 mission, and more, here are some of my key (non-Nick) sources for this video: https://www.nps.gov/articles/fresnel-... https://www.ponceinlet.org/Understand... https://climate.nasa.gov/news/991/gen... https://uslhs.org/sites/default/files... https://uslhs.org/reflector-chandeliers https://www.lighthousefriends.com/lig... http://pointsur.org/documents/Fresnel... Image references: Lewis lantern: https://uslhs.org/reflector-chandeliers Fresnel lens: https://www.ponceinlet.org/Understand... #greatlakes #lighthouse

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