Stuff You Missed in History Class

Samuel Plimsoll was an advocate for better working conditions for sailors, and for a lot of other things. A lot of contemporary accounts refer to him as an agitator.
Research:
Bibby, Miriam. “Samuel Plimsoll and the Plimsoll Line.” Historic UK. June 14, 2024. https://www.historic-uk.com/HistoryUK/HistoryofBritain/Samuel-Plimsoll-Line/
Britannica Editors. "Samuel Plimsoll". Encyclopedia Britannica, 30 May. 2026, https://www.britannica.com/biography/Samuel-Plimsoll
“Death of Mr. Samuel Plimsoll.” The Lichfield Mercury. June 4, 1898. https://www.newspapers.com/image/797510210/?match=1&terms=%22samuel%20plimsoll%22
“Friends of Humanity.” Democrat and Chronicle. Apr 27, 1913. https://www.newspapers.com/image/135735684/?match=1&terms=%22samuel%20plimsoll%22
Glover, William. “Samuel Plimsoll and the 1880 Carriage of Grain Legislation.” The Northern Mariner / Le marin du nord, XXX, No. 4 (Winter 2020), 419-448. https://www.cnrs-scrn.org/northern_mariner/vol30/tnm_30_419-448.pdf
“Jack Tar’s Friend.” The Atchison Daily Globe. July 17, 1896. https://www.newspapers.com/image/479999267/?match=4&terms=%22samuel%20plimsoll%22
Japp, Alexander H. “Good men and true : biographies of workers in the fields of beneficence and benevolence.” Philadelphia. Gebbie. 1890. Accessed online: https://archive.org/details/goodmentrue0000unse/page/10/mode/2up
Jones, Nicolette. “The Plimsoll Sensation.” London. Little, Brown. 2006.
Langenberg, William H. “The Plimsoll Mark.” U.S. Naval Institute. Naval History. June 1992. https://www.usni.org/magazines/naval-history-magazine/1992/june/plimsoll-mark
“Lundhill Colliery Explosion.” Northern Mine Research Society. https://nmrs.org.uk/mines-map/accidents-disasters/yorkshire/lundhill-colliery-explosion-barnsley-1857/
“The Name of Samuel Plimsoll … “ Birmingham Gazette. June 4, 1898. https://www.newspapers.com/image/815489724/?match=1&terms=%22samuel%20plimsoll%22
“People's College Sheffield (1842 - 1878).” University of Sheffield. https://archives.shef.ac.uk/agents/corporate_entities/212
Plimsoll, Samuel. “Our Seamen: An Appeal.” London. Virtue. 1873. Accessed online: https://archive.org/details/b20406691/page/n15/mode/2up
Robertson, Jen. “It's Plimsoll Day! (and we're talking about ships, not shoes).” National Museums Liverpool. https://www.liverpoolmuseums.org.uk/stories/its-plimsoll-day-and-were-talking-about-ships-not-shoes
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Heat waves don’t get as much attention as blizzards, floods, and hurricanes, but extreme heat is one of the deadliest weather events on average.
Research:
National Weather Service. “Weather Related Fatality and Injury Statistics.” https://www.weather.gov/hazstat
Last, John. “This Summer’s Drought Is Europe’s Worst in 500 Years. What Happened Last Time?” Smithsonian Magazine. 9/8/2022. https://www.smithsonianmag.com/history/this-summers-drought-is-europes-worst-in-500-years-what-happened-last-time-180980711/
Wetter, Oliver; Seneviratne, Sonia I. et al. “The year-long unprecedented European heat and drought of 1540 - a worst case.” Climatic Change 125(3-4), https://doi.org/10.1007/s10584-014-1184-2
Orth, Rene et al. “Did European temperatures in 1540 exceed present-day records?” Environmental Research Letters. 11 (2016) 114021 doi:10.1088/1748-9326/11/11/114021.
United Nations Environment Programme. “Impacts of summer 2003 heat wave in Europe.” Environmental Alert Bulletin. https://www.unisdr.org/files/1145_ewheatwave.en.pdf
Pfister, Christian. “The ‘Black Swan’ of 1540: Aspects of a European Megadrought.” From Climate Change and Cultural Transition in Europe. Brill. 1/1/2018. doi:10.1163/9789004356825_007
Grodzinsky, Ewa, and Märta Sund Levander. “History of the Thermometer.” Understanding Fever and Body Temperature: A Cross-disciplinary Approach to Clinical Practice 23–35. 23 Aug. 2019, doi:10.1007/978-3-030-21886-7_3
John Huxham, Dr. Watson. “Remarks upon the Heat of the Air in July 1757. in an Extract of a Letter from John Huxham, M. D. F. R. S. to William Watson, M. D. F. R S. Dated at Plymouth 19th of That Month. With Additional Remarks by Dr. Watson.” Philosophical Transactions (1683-1775), Vol. 50 (1757 - 1758), pp. 428-430 (3 pages). Via JSTOR. https://www.jstor.org/stable/105279.
Huxham, John. “An Account of the Extraordinary Heat of the Weather in July 1757, and of the Effects of It. In a Letter from John Huxham, M. D. F. R. S. to Wm. Watson, M. D. F. R. S..” Philosophical Transactions (1683-1775), Vol. 50 (1757 - 1758). Via JSTOR. https://www.jstor.org/stable/105292
Smeaton, John. “Remarks on the Different Temperature of the Air at Edystone, from That Observed at Plymouth, between the 7th and 14th of July 1757. By Mr. John Smeaton, F. R. S.” Philosophical Transactions (1683-1775), Vol. 50 (1757 - 1758). https://www.jstor.org/stable/105286
Sunderland, Helen. “The Great British Summer? A Historical Heatwave.” Doing History In Public. 8/12/2025. https://doinghistoryinpublic.org/2025/08/12/the-great-british-summer-a-historical-heatwave/
Scott, John. “Four elegies, descriptive and moral.” London J. Buckland. 1760.
The Western Flying Post; or, Sherborne and Yeovil Mercury. Page 3. 8/15/1757.
Lind, James. “An essay on the most effectual means of preserving the health of seamen in the Royal Navy.” 1774.
Walpole, Horace. “The letters of Horace Walpole, fourth earl of Orford.” Vol. 3: 1750-1756. Oxford. 1903.
Zwierlein, Cornel. "Chapter 3 The Danger between Nature and Culture: The Quotidian Threat of Urban Fires in the Premodern Era". Prometheus Tamed. Leiden, The Netherlands: Brill, 2021. https://doi.org/10.1163/9789004431225_004 Web.
Luterbacher, Jürg et al. “European Seasonal and Annual Temperature Variability, Trends and Extremes since 1500.” Science 303, 1499 (2004). DOI: 10.1126/science.1093877
Beniston, Martin. “The 2003 heat wave as an example of summers in a greenhouse climate? Observations and climate model simulations for Basel, Switzerland.” Global and Planetary Change. Volume 44, Issues 1–4, December 2004. https://www.sciencedirect.com/science/article/abs/pii/S0921818104000980
Franck, Marcy. “Heat waves and annual death rates in older adults in the United States.” Harvard T.H. Chan School of Public Health. 3/16/2026. https://hsph.harvard.edu/news/heat-waves-and-annual-death-rates-in-older-adults-in-the-united-states/
Poitras, Colin. “Warming U.S. climate linked to rising deaths from heat.” Yale School of Public Health. 11/7/2025. https://ysph.yale.edu/news-article/warming-us-climate-linked-to-rising-deaths-from-heat/
World Meteorological Association. “Western Europe has hottest June on record.” 7/9/2026. https://wmo.int/media/news/western-europe-has-hottest-june-record
Cole, Deborah. “Germany records nearly 100 drowning deaths, many of them young men, in June heatwave.” The Guardian. 6/12/2026. https://www.theguardian.com/world/2026/jul/12/germany-drowning-deaths-heatwave-paris-france-spain
PBS News. “Europe swelters under an early heat wave as France records 40 drowning deaths.” 6/23/2026. https://www.pbs.org/newshour/world/europe-swelters-under-an-early-heat-wave-as-france-records-40-drowning-deaths
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This 2018 episode covers Libertalia, which, in truth, may be completely fictional. It's called a pirate settlement, though the man who spearheaded it claimed he wasn't actually a pirate.
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Tracy shares the topics she considered for the recording in the Bahamas but decided against. Holly talks about her admiration for Thomas Huxley.
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Huxley is an example of having a good attitude about publicly acknowledging errors and learning from them. He earned the nickname “Darwin’s bulldog” for his very vocal support of Darwin’s work, and he wanted to promote science and education, particularly to people that didn’t normally have access to those things.
Research:
Bernoulli, D., Jenkyns, H.C. “Thomas Henry Huxley, a stone tablet, coccoliths, and deep-sea sediments in the high Alps.” Int J Earth Sci (Geol Rundsch) 112, 1661–1669 (2023). https://doi.org/10.1007/s00531-023-02330-5
Bowen, Keith. “Thomas Henry Huxley.” Ebsco. 2024. https://www.ebsco.com/research-starters/history/thomas-henry-huxley
Burkhardt, Richard W.. "Jean-Baptiste Lamarck". Encyclopedia Britannica, 14 Dec. 2025, https://www.britannica.com/biography/Jean-Baptiste-Lamarck
Darwin, Charles. “On the Origin of Species.” JOHN MURRAY, ALBEMARLE STREET. London. 1859. https://www.gutenberg.org/files/1228/1228-h/1228-h.htm
Desmond, Adrian J. "Thomas Henry Huxley". Encyclopedia Britannica, 25 Jun. 2026, https://www.britannica.com/biography/Thomas-Henry-Huxley
Dolan, John R. “The famous and lesser-known illustrations of Thomas Huxley’s Bathybius.” History of Oceanography. International Commission of the History of Oceanography. https://oceansciencehistory.com/2020/07/13/the-famous-and-lesser-known-illustrations-of-thomas-huxleys-bathybius/
“Freshwater Bathybius.” Nature 4, 49–50 (1871). https://doi.org/10.1038/004049b0
“The Great Debate.” University of Oxford Museum of Natural History. https://oumnh.ox.ac.uk/great-debate
“The History of Evolutionary Thought.” Understanding Evolution. Berkeley University. https://evolution.berkeley.edu/the-history-of-evolutionary-thought/1800s/early-concepts-of-evolution-jean-baptiste-lamarck/
Huxley, T.H. “Agnosticism.” K. Paul, Trench. London. 1889. https://archive.org/details/a622650700huxluoft/page/169/mode/1up
Huxley, T.H. “Aphorisms and Reflections. From the Works of T. H. HUXLEY, Selected by
Henrietta A. Huxley. Macmillan and Co. London. 1907. Accessed online: http://aleph0.clarku.edu/huxley/Book/Aphor.html
Huxley, T.H. “Autobiography and Selected Essays.” Riverside College Classics. 1909. Accessed online: https://www.gutenberg.org/files/1315/1315-h/1315-h.htm#link2H_4_0007
Huxley, T.H. “Collected Essays, Volume V: Science and Christian Tradition.” https://www.gutenberg.org/files/15905/15905-h/15905-h.htm
Huxley, T.H. “Evidence as to man's place in nature.” D. Appelton and Co. New York. 1863. https://archive.org/details/evidenceastomans00huxl/page/n1/mode/2up
Huxley, T.H. “On Some Organisms Living at Great Depths in the North Atlantic Ocean.” Quarterly Journal of Microscopical Science. viii., new Series, 1868, pp. 203-212. http://aleph0.clarku.edu/huxley/SM3/bathy.html
Huxley, T.H. “On the Relations of Man to the Lower Animals.” Project Gutenberg eBook. 2001. https://www.gutenberg.org/cache/epub/2932/pg2932-images.html
Joshi RS. “The Inner Root Sheath and the Men Associated with it Eponymically.” Int J Trichology. 2011 Jan;3(1):57-62. https://pmc.ncbi.nlm.nih.gov/articles/PMC3129131/
Lamarck, Jean-Baptiste. “Zoological Philosophy.” Macmillan. London. 1914. https://archive.org/details/ZoologicalPhilosophy
Lyons, Sherrie L. “Thomas Henry Huxley : the evolution of a scientist.” Prometheus Books. New York. 1999.
McGraw, Donald J. “Bye-Bye Bathybius: The Rise and Fall of a Marine Myth.” Bios, vol. 45, no. 4, 1974, pp. 164–71. JSTOR, http://www.jstor.org/stable/4607257
“Nobel Prize in Physiology or Medicine 1963.” The Nobel Prize. https://www.nobelprize.org/prizes/medicine/1963/summary/
Pearce, JMS. “Thomas Henry Huxley.” Hektoen International. Sept. 18, 2020. https://hekint.org/2020/09/18/thomas-henry-huxley/
Schwartz, Joel S. “Darwin, Wallace, and Huxley, and ‘Vestiges of the Natural History of Creation.’” Journal of the History of Biology, vol. 23, no. 1, 1990, pp. 127–53. JSTOR, http://www.jstor.org/stable/4331120
“Thomas Henry Huxley.” Darwin Correspondence Project. University of Cambridge. https://www.darwinproject.ac.uk/thomas-henry-huxley
“Thomas Henry Huxley (1825-1895).” Humanist Heritage. https://heritage.humanists.uk/thomas-henry-huxley/
Tunstad, Erik. “Darwin's Bulldog: Thomas Huxley 200 Years.” Prosa. July 10, 2025. https://prosa.no/artikler/aktuelt/darwins-bulldog-thomas-huxley-200-ar
Wyhe, John van. “It ain't necessarily so ...” The Guardian. Feb 9, 2008. https://www.theguardian.com/science/2008/feb/09/darwin.myths

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