Monarch butterflies are still in the middle of their story – and it’s one that is precarious. Humans are still trying to figure out a lot about them, and aspects of the monarch story have been misrepresented over the years. Research: Monarch Joint Venture: https://monarchjointventure.org/ “Monarch Butterfly.” The National Wildlife Federation. https://www.nwf.org/Educational-Resources/Wildlife-Guide/Invertebrates/Monarch-Butterfly Sutherland, Douglas W.S. and Jean Adams, ed. “The Monarch Butterfly – Our National Insect.” Part of “Insect Potpourri: Adventures in Entomology.” CRC Press. 1992. Britannica, The Editors of Encyclopaedia. "Danaus". Encyclopedia Britannica, 15 Feb. 2018, https://www.britannica.com/topic/Danaus-Greek-mythology Kathleen S. Murphy. “Collecting Slave Traders: James Petiver, Natural History, and the British Slave Trade.” The William and Mary Quarterly, vol. 70, no. 4, 2013, pp. 637–70. JSTOR, https://doi.org/10.5309/willmaryquar.70.4.0637 Müller-Wille, Staffan. "Carolus Linnaeus". Encyclopedia Britannica, 19 May. 2022, https://www.britannica.com/biography/Carolus-Linnaeus Stearns, Raymond Phineas. “James Petiver: Promoter of Natural Science, c.1663-1718.” American Antiquarian Society. October 1952. https://www.americanantiquarian.org/proceedings/44807240.pdf “Mark Catesby (1683 – 1749).” Catesby Commemorative Trust. 2012. https://web.archive.org/web/20130906122250/http://www.catesbytrust.org/mark-catesby/ Smith-Rogers, Sheryl. “Maiden of the Monarchs.” TEXAS PARKS & WILDLIFE. March 2016. https://monarchjointventure.org/images/uploads/documents/legacy_monarch_catalina_trail_article.pdf Scott, Alec. “Where do you go, my lovelies?” University of Toronto Magazine. Aug. 24, 2015. https://magazine.utoronto.ca/campus/history/where-do-you-go-my-lovelies-norah-and-fred-urquhart-monarch-butterfly-migration/ Hannibal, Mary Ellen. “How you can help save the monarch butterfly -- and the planet.” TEDTalk. April 28, 2020. https://www.youtube.com/watch?v=wvJTbegktKc Jarvis CE, Oswald PH. The collecting activities of James Cuninghame FRS on the voyage of Tuscan to China (Amoy) between 1697 and 1699. Notes Rec R Soc Lond. 2015 Jun 20;69(2):135–53. doi: 10.1098/rsnr.2014.0043. “The US Endangered Species Act.” World Wildlife Federation. https://www.worldwildlife.org/pages/the-us-endangered-species-act#:~:text=Passed%20with%20bipartisan%20support%20in,a%20species%20should%20be%20protected. Associated Press. “Beloved monarch butterflies are now listed as endangered.” WBEZ Chicago. July 23, 2022. https://www.wbez.org/stories/beloved-monarch-butterflies-are-now-listed-as-endangered/0f3cf69b-8376-42eb-af0a-9e8b8b4ab6b3 Garland, Mark S., and Andrew K. Davis. “An Examination of Monarch Butterfly (Danaus Plexippus) Autumn Migration in Coastal Virginia.” The American Midland Naturalist, vol. 147, no. 1, 2002, pp. 170–74. JSTOR, http://www.jstor.org/stable/3083045 “Natural History – Monarch Butterfly.” Center for Biological Diversity. https://www.biologicaldiversity.org/species/invertebrates/monarch_butterfly/natural_history.html Catesby, Mark. “A Monarch butterfly, with orchids.” C. 1722-6. Royal Collection Trust. https://www.rct.uk/collection/926050/a-monarch-butterfly-with-orchids Daly, Natasha. “Monarch butterflies are now an endangered species.” July 21, 2022. National Geographic. https://www.nationalgeographic.com/animals/article/monarch-butterflies-are-now-an-endangered-species Walker, A., Oberhauser, K.S., Pelton, E.M., Pleasants, J.M. & Thogmartin, W.E. 2022. Danaus plexippus ssp. plexippus. The IUCN Red List of Threatened Species 2022: e.T194052138A200522253. https://dx.doi.org/10.2305/IUCN.UK.2022-1.RLTS.T194052138A200522253.en Price, Michael. “Monarch miscalculation: Has a scientific error about the butterflies persisted for more than 40 years?” Science. Feb. 24, 2007. https://www.science.org/content/article/monarch-miscalculation-has-scientific-error-about-butterflies-persisted-more-40-years Jiang, Kevin. “Study sheds light on evolutionary origins and the genes central to migration.” UChicago News. Oct. 6, 2014. https://news.uchicago.edu/story/genetic-secrets-monarch-butterfly-revealed Borkin, Susan Sullivan. “Notes on Shifting Distribution Patterns and Survival of Immature Danaus Plexippus (Lepidoptera: Danaidae) on the Food Plant Asclepias Syriaca.” The Great Lakes Entymologist. Vol. 15, No. 3. Fall 1982. https://scholar.valpo.edu/cgi/viewcontent.cgi?article=1437&context=tgle Cudmore, Rebecca. “SNAPSHOT: Monarchs with big, bright wings arrive in Mexico first.” ScienceLine. June 16, 2014. https://scienceline.org/2014/06/monarch-migration/ Brower, Lincoln P. “UNDERSTANDING AND MISUNDERSTANDING THE MIGRAnON OF THE MONARCH BUTTERFLY (NYMPHALIDAE) IN NORTH AMERICA: 1857-1995.” Journal of the Lepidopterists' Society. Vol. 49, No. 4, 1995. https://www.fs.fed.us/wildflowers/pollinators/Monarch_Butterfly/documents/Understanding_Monarch_Migration1995-Brower.pdf See omnystudio.com/listener for privacy information.

This 2018 episode covers an artist and architect from 16th-century Italy. But what really made him famous was his writing. He penned biographies of famous artists, but he wasn't very exacting about the details.See omnystudio.com/listener for privacy information.

Holly and Tracy talk about the gossipy nature of press coverage about men like Rudolph Diesel. The gap between Ibn Khaldūn's life and the time when analysis of his work really began is also discussed. See omnystudio.com/listener for privacy information.

Ibn Khaldūn was a Muslim writer who covered history, economics and sociology. He lived during a time of chaos and strife, and his life was mired in the political drama and intrigue of the day. Research:  Alatas, Syed Farid. “Ibn Khaldun.” Oxford Centre for Islamic Studies. Oxford University Press. 2012. Albertini, Tamara. “Special Issue: Politics, Nature and Society – The Actuality of North African Philosopher Ibn Khaldūn.” Philosophy East & West Volume 69, Number 3 July 2019. Al-Jubouri, Imadaldin. “Ibn Khaldun and the Philosophy of History.” Philosophy Now. 2005. https://philosophynow.org/issues/50/Ibn_Khaldun_and_the_Philosophy_of_History Gearon, Eamonm. “Turning Points in Middle Eastern History.” The Teaching Company, 2016. "Ibn Khaldun Pioneers the Sociological View of History." Global Events: Milestone Events Throughout History, edited by Jennifer Stock, vol. 5: Middle East, Gale, 2014, pp. 239-243. Gale In Context: Global Issues, link.gale.com/apps/doc/CX3728000758/GPS?u=mlin_n_melpub&sid=bookmark-GPS&xid=cf4f6560. Accessed 20 July 2022. "Ibn Khaldūn." Complete Dictionary of Scientific Biography, vol. 7, Charles Scribner's Sons, 2008, pp. 320-323. Gale In Context: U.S. History, link.gale.com/apps/doc/CX2830902289/GPS?u=mlin_n_melpub&sid=bookmark-GPS&xid=c1137955. Accessed 20 July 2022. International Horizons with John Torpey. “Ibn Khaldun’s the Muqadimah: The Best Book You’ve Never Read.” With Aziz Al-Azmeh. Podcast. 10/20/2021. https://ralphbuncheinstitute.org/2021/12/20/ibn-khalduns-the-muqadimah-the-best-book-youve-never-read/ Irwin, Robert. “Ibn Kaldun: An Intellectual Biography.” Princeton University Press. 2018. Issawi, Charles. "Ibn Khaldūn". Encyclopedia Britannica, 24 May. 2022, https://www.britannica.com/biography/Ibn-Khaldun. Accessed 20 July 2022. See omnystudio.com/listener for privacy information.

We have enough pieces of the story of Rudolf Diesel’s life that remain consistent that we can fairly confidently construct his biography. But the way his life ended will forever be a mystery.  Research: Harford, Tim. “How Rudolf Diesel's engine changed the world.” BBC. Dec. 19, 2016. https://www.bbc.com/news/business-38302874 “Rudolf Diesel and his invention.” Mercedes-Benz. Feb 21, 2011. https://group-media.mercedes-benz.com/marsMediaSite/en/instance/ko.xhtml?oid=9361302 Bryant, Lynwood. “The Development of the Diesel Engine.” Technology and Culture, vol. 17, no. 3, 1976, pp. 432–46. JSTOR, https://doi.org/10.2307/3103523 “Dr. Rudolf Diesel Dead, It Is Feared.” The San Francisco Examiner. Oct. 1, 1913. https://www.newspapers.com/image/460520428/?terms=%22rudolf%20diesel%22&match=1 Britannica, The Editors of Encyclopaedia. "Rudolf Diesel". Encyclopedia Britannica, 14 Mar. 2022, https://www.britannica.com/biography/Rudolf-Diesel “Dr. Diesel Vanishes From a Steamship.” New York Times. Oct. 1, 1913. https://timesmachine.nytimes.com/timesmachine/1913/10/01/100408236.pdf?pdf_redirect=true&ip=0 “No Light on Diesel’s Fate.” New York Times. October 3, 1913. https://timesmachine.nytimes.com/timesmachine/1913/10/03/100650746.pdf?pdf_redirect=true&ip=0 “Diesel Family in Straits.” New York Times. Oct. 13, 1913. https://timesmachine.nytimes.com/timesmachine/1913/10/13/104913506.pdf?pdf_redirect=true&ip=0 “The Tragedy of Genius.” Holyrood Banner. Jan. 8, 1914. https://www.newspapers.com/image/485723537/?terms=%22rudolf%20diesel%22&match=1 “Diesel Was Bankrupt.” New York Times. Oct. 15, 1913. https://timesmachine.nytimes.com/timesmachine/1913/10/15/100651861.pdf?pdf_redirect=true&ip=0 “No Ray of Light in Diesel Mystery.” New York Times. Oct. 2, 1913. https://timesmachine.nytimes.com/timesmachine/1913/10/02/100408778.pdf?pdf_redirect=true&ip=0 “Reports Dr. Diesel Living in Canada.” New York Times. March 16, 1914. https://timesmachine.nytimes.com/timesmachine/1914/03/16/100084107.pdf?pdf_redirect=true&ip=0 Lewis, Danny. “When the Inventor of the Diesel Engine Disappeared.” Smithsonian. Sept 29, 2016. https://www.smithsonianmag.com/smart-news/when-inventor-diesel-engine-disappeared-180960635/#dzfOXtDDTgWXFGi4.99 See omnystudio.com/listener for privacy information.

This 2011 episode from previous hosts Sarah and Deblina covers Timur the Lame (Tamerlane to Westerners) conquering areas from Persia to Russia throughout the late 1300s, and his last great battle in Ankara against Sultan Bayezid I.See omnystudio.com/listener for privacy information.

Tracy and Holly talk about blood pressure and Diuril man. Holly then shares a story of how early fastener sales worked and how zippers have become specialized. See omnystudio.com/listener for privacy information.

The development of the zipper was oddly arduous, with many fastener versions tried out before the zipper we know today and have on our clothes, handbags, and luggage was finally figured out.  Research: Friedel, Robert. “Zipper: an Exploration in Novelty.” W.W. Norton. 1994. Britannica, The Editors of Encyclopaedia. "zipper". Encyclopedia Britannica, 21 Apr. 2020, https://www.britannica.com/art/zipper Johnson, Ian. “Zipper anniversary: 10 bits of trivia to impress the pants off you.” CBC News. April 29, 2013. https://www.cbc.ca/news/science/zipper-anniversary-10-bits-of-trivia-to-impress-the-pants-off-you-1.1305202 Lewis, Danny. “One Japanese Company Makes Half of the World’s Zippers.” Smithsonian. Sept 3, 2015. https://www.smithsonianmag.com/smart-news/one-japanese-company-makes-half-worlds-zippers-180956482/ “Gideon Sundback.” National Inventors Hall of Fame. https://www.invent.org/inductees/gideon-sundback Bauman, Richard. “The Ups and Downs of Success.” Fremont Tribune. Nov. 20, 2006. https://www.newspapers.com/image/550483507/?terms=whitcomb%20judson&match=1 “Gideon Sundback celebrated in a Google doodle.” The Guardian. April 23, 2012. https://www.theguardian.com/technology/2012/apr/24/gideon-sundback-celebrated-google-doodle “Whitcomb Judson.” Lemelson MIT. https://lemelson.mit.edu/resources/whitcomb-judson “Zipper’s Evolution Slow, Shaky.” Spokane Chronicle. March 16, 1978. https://www.newspapers.com/image/578438126/ Altrowitz, Abe. “The Zipper was ‘Born’ and Raised Here.” The Minneapolis Star. June 12, 1973. https://www.newspapers.com/image/190250601/?terms=whitcomb%20judson&match=1 See omnystudio.com/listener for privacy information.

Ancient cultures all over the world used the pulse as a diagnostic tool. And eventually, we figured out how to measure blood pressure, and hypertension came to be viewed as a disease. Research: Booth, Jeremy. “A Short History of Blood Pressure Measurement.” Proceedings of the Royal Society of Medicine. Vol. 70. Nov. 1977. https://journals.sagepub.com/doi/pdf/10.1177/003591577707001112 Elias, Merrill F. and Amanda L. Goodell. “Setting the record straight for two heroes in hypertension: John J. Hay and Paul Dudley White.” Journal of Clinical Hypertension. 9/21/2019. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8030549/#jch13650-bib-0004 Greene, Jeremy A. “Releasing the Flood Waters: Diruil and the Reshaping of Hypertension.” Bulletin of the History of Medicine, Vol. 79, No. 4, Winter 2005. https://doi.org/10.1353/bhm.2005.0153 Harold, John Gordon. “Harold on History | Historical Perspectives on Hypertension.” American College of Cardiology. 11/20/2017. https://www.acc.org/latest-in-cardiology/articles/2017/11/14/14/42/harold-on-history-historical-perspectives-on-hypertension Hay, John. “The Significance of a Raised Blood Pressure.” British Medical Journal. 7/11/1931. Johnson, Richard J. et al. “The discovery of hypertension: evolving views on the role of the kidneys, and current hot topics.” Renal Physiology. 1/2/2015. https://doi.org/10.1152/ajprenal.00503.2014 Kotchen, Theodore A. “Historical Trends and Milestones in Hypertension Research: A Model of the Process of Translational Research.” Hypertension. Vol. 58, 2011.  https://doi.org/10.1161/HYPERTENSIONAHA.111.177766 Labos, Christopher. “The Current Hypertension Controversy: There is None..” McGill. 2/8/2018. https://www.mcgill.ca/oss/article/general-science/current-hypertension-controversy-there-none Lüscher, Thomas F. “High blood pressure: new frontiers of an old risk factor.” European Heart Journal (2017) 38, 2791–2794. doi:10.1093/eurheartj/ehx544 Moser, Marvin. “Historical Perspectives on the Management of Hypertension.” Journal of Clinical Hypertension. 5/22/2007. https://doi.org/10.1111/j.1524-6175.2006.05836.x Postel-Vinay, Nicolas, editor. “A Century of Arterial Hypertension 1896-1996.” Wiley. 1996. Saklayen, Mohammad G. and Neeraj V. Deshpande. “Timeline of History of Hypertension Treatment.” Frontiers in Cardiovascular Medicine. 2/23/2016. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4763852/ See omnystudio.com/listener for privacy information.

This 2017 episode covers the U.S.S. Indianapolis, known today for its crew's horrifying wait for rescue after being torpedoed following a secret mission at the end of World War II. But the ship's history goes back much farther than that.See omnystudio.com/listener for privacy information.