

Don't Panic Geocast
John Leeman and Shannon Dulin
John Leeman and Shannon Dulin discuss geoscience and technology weekly for your enjoyment! Features include guests, fun paper Friday selections, product reviews, and banter about recent developments. Shannon is a field geologist who tolerates technology and John is a self-proclaimed nerd that tolerates geologists.
Episodes
Mentioned books

Nov 8, 2024 • 58min
Episode 401 - "I fell into a lot of bogs"
This week, we dive into the fascinating world of coal—its origins, types, and the role it has played in shaping economies, past and present. We discuss coal’s formation in ancient swampy environments, the journey from mining to electricity generation, and the transition we’re witnessing as the world moves toward renewable energy sources. We wrap up with a Fun Paper Friday that challenges the classic "Infinite Monkeys Theorem"—could monkeys really type out Shakespeare if given enough time?
How Coal Forms and Coal Types - World Coal Association
Energy Density of Coal Types - Hypertextbook
Mining Methods and Processing - National Academies
Coal Transportation - U.S. Energy Information Administration (EIA)
Coal’s Role in the Industrial Revolution - History.com
Global Coal Power Statistics - Statista
Future of Coal in Energy Transitions - International Energy Agency (IEA)
Fun Paper Friday
Can monkeys really type out Shakespeare? This study explores the probability of typing coherent text with a finite number of monkeys and limited time. Spoiler: even with thousands of monkeys, the odds are astronomically low, revealing the true limits of randomness.
Woodcock, Stephen, and Jay Falletta. "A numerical evaluation of the Finite Monkeys Theorem." Franklin Open (2024): 100171.
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John Leeman
www.johnrleeman.com
@geo_leeman
Shannon Dulin
@ShannonDulin

Nov 1, 2024 • 37min
Episode 400 - "Mushroom Cloud of Salt"
Throughout human history, certain minerals have held immense power, shaping economies, societies, and entire civilizations. In this economic rocks series, John and Shannon discuss how essential minerals like salt, gold, and coal influenced historical events and continue to impact modern geopolitics. This week we start with salt and how it is essential to many aspects of our day to day.
Learn More
History of Salt in Ancient Civilizations - Learn how salt became an essential part of trade, diet, and religion in ancient China, Egypt, and Rome:contentReference[oaicite:0]{index=0}.
The Role of Salt in the Roman Empire - Discover how the Roman Empire used salt as currency and a political tool to control its territories:contentReference[oaicite:1]{index=1}.
The Impact of the Salt Trade in West Africa - Learn how salt was traded for gold and helped build the Ghana and Mali empires, creating a network of trade routes that shaped the region’s history:contentReference[oaicite:2]{index=2}.
Fun Paper Friday
This week's Fun Paper Friday features a study on the leaf-mimicking abilities of Boquila trifoliolata. The vine is capable of changing the shape and size of its leaves to resemble those of neighboring plants, potentially as a form of camouflage against herbivores. But the most surprising part? It can even mimic artificial plastic leaves. This finding challenges existing theories that leaf mimicry is driven solely by chemical signaling or genetic exchange between plants, suggesting instead that Boquila may possess a form of plant vision through specialized light-sensitive cells called “plant ocelli.” This discovery opens new possibilities for understanding plant sensory and adaptive behaviors.
White, J., & Yamashita, F. (2022). Boquila trifoliolata mimics leaves of an artificial plastic host plant. Plant Signaling & Behavior, 17(1), e1977530.
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@dontpanicgeo
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John Leeman
www.johnrleeman.com
@geo_leeman
Shannon Dulin
@ShannonDulin

Oct 18, 2024 • 59min
Episode 399 - "We would have already sacrificed some people"
In our 400th episode, we take a moment to reflect on some of our favorite past episodes and Fun Paper Fridays that have brought joy, knowledge, and a good laugh to the show. From memorable guests to quirky science papers, this episode is a tribute to everything that makes the Don't Panic Geocast special. Join us for this nostalgia-packed episode where we look back at the highlights of 399 episodes!
Highlighted Episodes
Episode 350 - "Borehole to Hell"
Episode 49 - "Would it blow your mind if I told you Africa is 14x larger than Greenland?"
Episode 50 - "Some serious geometric voodoo" Projections Part 2
Episode 364 - Geology of War "I'm glad I listen to this podcast"
Episode 6 - "What if you calibrated your candles differently?"
Episode 358 - "Put a pin in it" Surveillance Balloons
Episode 16 - "We are scared" Nature Calls
Top Titles
Episode 52 - "You pay for significant digits"
Episode 4 - "Is that cumulonimbus cloud storage?" Data Backups
Favorite Fun Papers
Kuna, Václav M., and John L. Nábělek. "Seismic crustal imaging using fin whale songs." Science 371.6530 (2021): 731-735.
Does removing something take more brain power than adding something? Adams, Gabrielle S., et al. "People systematically overlook subtractive changes." Nature 592.7853 (2021): 258-261.
Science makes you feel stupid and that's okay!Schwartz, Martin A. "The importance of stupidity in scientific research." Journal of Cell Science 121.11 (2008): 1771-1771.
Beaty, Chester B. "Great big boulders I have known." Geology 17.4 (1989): 349-352.
Winter is coming, but why? Orbital mechanics to the rescue! Paradise, Adiv, et al. "The Long Night: Modeling the Climate of Westeros." arXiv preprint arXiv:1903.12195 (2019).
Where do you go to find mythical creatures? There's a paper for that! Beconytė, Giedrė, Agnė Eismontaitė, and Jovita Žemaitienė. "Mythical creatures of Europe." Journal of Maps 10.1 (2014): 53-60.
Yanai, Itai, and Martin Lercher. "The two languages of science." Genome Biology 21.1 (2020): 1-9.
Meyer-Rochow, V. B., & Gal, J. (2003). Pressures produced when penguins pooh?calculations on avian defaecation. Polar Biology, 27(1), 56–58. http://doi.org/10.1007/s00300–003–0563–3
Dirksen, Neele, et al. "Learned control of urinary reflexes in cattle to help reduce greenhouse gas emissions." Current Biology 31.17 (2021): R1033-R1034.
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@dontpanicgeo
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John Leeman
www.johnrleeman.com
@geo_leeman
Shannon Dulin
@ShannonDulin

Oct 11, 2024 • 1h 1min
Episode 398 - "Are you going to take our jobs?"
Artificial Intelligence (AI) is making its way into academic research and writing, offering a range of tools that can help streamline workflows, enhance creativity, and improve productivity. In this episode, John and Shannon dive into some of the AI tools they’ve been experimenting with and discuss broader questions about fairness, disclosure, and the evolving role of AI in academia.
Elsevier’s Policy on Generative AI in Writing
Research Rabbit - AI-powered tool for literature discovery.
GitHub Co-pilot - AI coding assistant.
Elicit - AI for automating literature reviews and generating research insights.
Magic To-Do - AI-based task management tool.
Autodraw - AI-powered drawing tool.
Fun Paper Friday Summary:
So if AI takes over the world, what would it take to destory it? A solar flare should do it, and maybe us, in.
The superstorms from space that could end modern life

Oct 4, 2024 • 50min
Episode 397 - "Terps"
This week, we delve into the fascinating world of the ancient dwelling mounds—terps—of the northern Netherlands. These man-made mounds served as elevated homes for communities living in low-lying, flood-prone areas. Join us as we explore the geology of these mounds, why they were essential for survival, and how modern technology is used to monitor soil subsidence and preserve these unique archaeological sites.
Learn More:
Wierdenland Museum: Information about the museum and its exhibits on dwelling mounds.
Late-Holocene sea-level reconstruction and sedimentological data: An in-depth academic article on the evolution of the coastal landscape and sea-level changes influencing terp construction.
Fun Paper Friday Summary:
In this episode’s Fun Paper Friday, we discuss B.F. Skinner’s “Pigeons in a Pelican.” The paper recounts the story of "Project Pigeon," a World War II experiment that explored using pigeons to guide missiles by pecking at visual targets. Though the project faced skepticism and was never implemented in combat, it highlighted the potential of animal training and laid a foundation for behaviorist research. The study is a testament to how creative ideas can push the boundaries of science, even if they seem outlandish at first.
Skinner, B. F. (1960). Pigeons in a Pelican.

Sep 6, 2024 • 54min
Episode 396 - "Please Don't Call the FBI" GEARS 2024
This week John and Shannon summarize the GEARS 2024 workshop, lessons learned, and talk about a record air pressure that was just a fluke.
Fun Paper Friday
Bureau of Meteorology says quality checks reveal air pressure record not broken, miscalculations published online
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John Leeman
www.johnrleeman.com
@geo_leeman
Shannon Dulin
@ShannonDulin

Aug 23, 2024 • 40min
Episode 395 - "Pressure Finds a Way"
Learn about the explosion at Yellowstone's Biscuit Basin site and what it means for the park. We also talk about drunk fruit flies and what they are teaching us about alcoholism.
Fun Paper Friday
Heberlein, Ulrike. "Genetics of alcohol-induced behaviors in Drosophila." Alcohol Research & Health 24.3 (2000): 185.
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John Leeman
www.johnrleeman.com
@geo_leeman
Shannon Dulin
@ShannonDulin

Aug 17, 2024 • 44min
Episode 394 - "Gates of Hell" Darvaza Gas Crater
This week we look at a geological oddity in Turkmenistan and see how getting a puppy can give you the blues.
Video of the Burning Crater
Fun Paper Friday
Ståhl, Aada, et al. "Development and validation of the puppy blues scale measuring temporary affective disturbance resembling baby blues." npj Mental Health Research 3.1 (2024): 27.
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www.dontpanicgeocast.com
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John Leeman
www.johnrleeman.com
@geo_leeman
Shannon Dulin
@ShannonDulin

Jul 26, 2024 • 1h 11min
Episode 393 - "Fujiwhara Effect!" Twisters Movie Review
We went to watch Twisters and review it from the standpoint of two people who have chased storms professionally. Also what do philosophers have to say about the original movie and its mythological reconsiliations?
Fun Paper Friday
King, Geoff. "The scientist as pioneer hero: Hollywood's mythological reconciliations in twister and contact." Science as Culture 8.3 (1999): 371-379.
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Support us on Patreon!
www.dontpanicgeocast.com
@dontpanicgeo
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John Leeman
www.johnrleeman.com
@geo_leeman
Shannon Dulin
@ShannonDulin

Jul 13, 2024 • 45min
Episode 392 - "Revisions"
This week we talk about when and how things get revised from classes to papers to theories. Also we read a paper about a curious cure for poisoning.
Fun Paper Friday
Sasanami, Misa, et al. "Oral ethanol treatment for ethylene glycol intoxication." Cureus 12.12 (2020).
Contact us:
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Support us on Patreon!
www.dontpanicgeocast.com
@dontpanicgeo
dontpanicgeocast@gmail.com
John Leeman
www.johnrleeman.com
@geo_leeman
Shannon Dulin
@ShannonDulin