Before Clarence Birdseye, frozen food was perceived as being low-quality and kind of gross. But after spending time in extremely cold climates, Birdseye figured out that speed freezing was the key to retaining freshness.

Research:

• “$1,900,000 Fraud Attempt Alleged in Insurance Deal.” St. Louis Post-Dispatch. May 2, 1917. https://www.newspapers.com/image/138253870/?match=1&terms=%22Clarence%20Birdseye%22
• “Alleged Clean-up of $1,900,000 in Two Days.” The Bennington Evening Banner. May 2, 1917. https://www.newspapers.com/image/546110078/?match=1&terms=%22Clarence%20Birdseye%22
• Birdseye, C. “Animal Food Product.” U.S. Patent Office. Aug. 12, 1930. https://patentimages.storage.googleapis.com/ff/f3/e3/ea3d0a5d1b6b7a/US1773080.pdf
• Birdseye, C. “METHOD OF PRESERVING PISCATORIAL PRODUCTS.” U.S. Patent Office. April 18, 1924. https://patentimages.storage.googleapis.com/b7/d9/5a/aeb7fae023f47e/US1511824.pdf
• Birdseye, Clarence, 1886-1956. Some Common Mammals of Western Montana in Relation to Agriculture and Spotted Fever, pamphlet, 1912; Washington D.C.. https://digital.library.unt.edu/ark:/67531/metadc87555/
• Britannica Editors. "Clarence Birdseye". Encyclopedia Britannica, 3 Oct. 2025, https://www.britannica.com/biography/Clarence-Birdseye
• “Celebrating American Innovation: Clarence Birdseye.” Council for Innovation Promotion. Sept. 14, 2023. https://c4ip.org/celebrating-american-innovation-clarence-birdseye/
• “Clarence Birdseye.” Lemelson-MIT. https://lemelson.mit.edu/resources/clarence-birdseye
• “Clarence Birdseye Is Dead at 69; Inventor of Frozen-Food Process; Developed Method for Quick Freezing and Also Devised System for Dehydrating.” New York Times. Oct. 9, 1956. https://www.nytimes.com/1956/10/09/archives/clarence-birdseye-is-dead-at-69-inventor-of-frozenfood-process.html
• “Frozen Food Market Size, Share & Industry Analysis, By Type (Frozen Ready Meals, Frozen Seafood & Meat Products, Frozen Snacks & Bakery Products, and Others), Distribution Channel (Supermarkets/Hypermarkets, Specialty Stores, Convenience Stores, and Online Retail), and Regional Forecast, 2025-2032.” Fortune Business Insights. Oct. 6, 2025. https://www.fortunebusinessinsights.com/frozen-food-market-10413
• “How Did Clarence Birdseye Shape the American Diet?” National Inventors Hall of Fame. Nov. 28, 2022. https://www.invent.org/blog/inventors/clarence-birdseye
• Kile, O.M. “Food That Is Fresh Though Frozen: New Preserving Process Aims to Maintain Cell Structure.” The Baltimore Sun. Nov. 10, 1929. https://www.newspapers.com/image/373627550/?match=1&terms=%22quick-frozen%22%20
• Kurlansky, Mark. “Birdseye: The Adventures of a Curious Man.” Thorndike Press. 2012.
• “Reinsurance for Policyholders in Defunct Concerns.” New-York Tribune. Nov. 11, 1917. https://www.newspapers.com/image/894239796/?match=1&terms=%22Clarence%20Birdseye%22
• “Supervisory Methods Lax.” The Kansas workman. Nov. 1, 1917. https://www.newspapers.com/image/480092568/?match=1&terms=%22Clarence%20Birdseye%22
• “Who invented frozen food?” Library of Congress. https://www.loc.gov/everyday-mysteries/technology/item/who-invented-frozen-food/

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The Great Fear was a panic during the French Revolution that spread through rural areas. It all started with a conspiracy theory.

Research:

• Davies, Alun. “The Origins of the French Peasant Revolution of 1789.” History, 1964, Vol. 49, No. 165 (1964). https://www.jstor.org/stable/24404527
• Elster, Jon. “The Two Great Fears of 1789.” Prepared for the Conference on “Emotions and Civil War”, Collège de France June 10-11 2010. https://www.college-de-france.fr/media/jon-elster/UPL13205_LePillouerThe_two_great_fears_of_1789.pdf
• Hill, Henry Bertram. “An Aftermath of the Great Fear.” The Journal of Modern History, Vol. 22, No. 4 (Dec. 1950). Via JSTOR. https://www.jstor.org/stable/1875896
• Kasal, Krystal. “Mapping out France's 'Great Fear of 1789' shows how misinformation spreads like a virus.” Phys.org. 8/28/2025. https://phys.org/news/2025-08-france-great-misinformation-virus.html
• Lefebvre, Georges. “The Great Fear of 1789; rural panic in revolutionary France.” Joan White, translator. Pantheon Books. 1973.
• Lenharo, Mariana. “An abiding mystery of the French Revolution is solved — by epidemiology.” Nature. 8/27/2025. doi: https://doi.org/10.1038/d41586-025-02739-9
• Mark, Harrison W. “Great Fear.” World History Encyclopedia. https://www.worldhistory.org/Great_Fear/
• Markoff, John. “Contexts and Forms of Rural Revolt: France in 1789.” The Journal of Conflict Resolution , Jun., 1986, Vol. 30, No. 2 (Jun., 1986), pp. Via JSTOR. https://www.jstor.org/stable/174254
• Pelz, William A. “The Rise of the Third Estate: The French People Revolt.” From A People's History of Modern Europe. Pluto Press. Via JSTOR. https://www.jstor.org/stable/j.ctt1c2crfj.8
• Tackett, Timothy. “Conspiracy Obsession in a Time of Revolution: French Elites and the Origins of the Terror, 1789-1792.” The American Historical Review , Jun., 2000, Vol. 105, No. 3. Via JSTOR. https://www.jstor.org/stable/2651806
• Zapperi, Stefano et al. “Epidemiology models explain rumour spreading during France’s Great Fear of 1789.” Nature. 8/27/2025. https://doi.org/10.1038/s41586-025-09392-2

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This 2019 episode is about general Thomas-Alexandre Dumas, who sounds like a character out of one of his son’s books. His life was a series of dramatic and daring adventures, including his rise up through the ranks of the French military.

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