John Leeman and Shannon Dulin
Don't Panic Geocast
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.
Author
John Leeman and Shannon Dulin
Category
Podcast website
Latest episode
Jun 26, 2026
Where to listen?
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Episodes
Episode 381 - "Desk Sedimentology" 08.03.2024 50:12
This week we talk about new national parks, sticky notes, and empirical evidence about fly fishing. Fun Paper Friday Britton, B. J., J. Grimley Evans, and J. M. Potter. "Does the fly matter? The CRACKPOT study in evidence based trout fishing." BMJ 317.7174 (1998): 1678-1680. Contact us: Show Support us on Patreon! www.dontpanicgeocast.com @dontpanicgeo show@dontpanicgeocast.com John Leeman www.joh...
Episode 380 - "Flame out like a bolide" 01.03.2024 1:02:32
This week we talk about how rocks get magnetic field imparted to them and if scientists are really discovering anything new these days. Fun Paper Friday Park, Michael, Erin Leahey, and Russell J. Funk. "Papers and patents are becoming less disruptive over time." Nature 613.7942 (2023): 138-144. Contact us: Show Support us on Patreon! www.dontpanicgeocast.com @dontpanicgeo John Leeman www.johnrleem...
Episode 379 - "How would you like to buy Brunton?" 23.02.2024 1:12:06
This week we're rejoined by the Heerschaps to learn about how they came to own and run Brunton and what's next for the company that is a staple of the geological, recreational, and military navigation world. Go Get a Brunton! EPISODE 109 - "REALLY SAD MICHAEL BOLTON MUSIC" LAUREN AND DAVE HEERSCHAP Fun Paper Friday This week's fun paper may make you think before saying "Tea, Earl Grey, Hot" Finste...
Episode 378 - "I love the font" 16.02.2024 42:06
We generally don't think of sedimentary rocks when we think of volcanoes, but they are real! Find out why sedimentologists don't have to be bored in volcanic terranes. Fun Paper Friday Torres-Company, Victor. "One ring to multiplex them all." Nature 546.7657 (2017): 214-215. Contact us: Show Support us on Patreon! www.dontpanicgeocast.com @dontpanicgeo John Leeman www.johnrleeman.com @geo_leeman S...
Episode 377 - "Definitely Panic - Another Oklahoma Earthquake" 09.02.2024 49:10
Oklahoma was rocked by another relatively large earthquake for a mid-continent region. We break it down, compare it to the 2011 earthquake and then talk about the hairy ball theorem. Fun Paper Friday McGrath, Peter. "An extremely short proof of the hairy ball theorem." The American Mathematical Monthly 123.5 (2016): 502-503. Contact us: Show Support us on Patreon! www.dontpanicgeocast.com @dontpan...
Episode 376 - "Got to get those pizza ovens hot" 03.02.2024 54:25
This week we tackle the controversial topic of fracking. Learn about how it works and what it does to help get oil and gas out of the ground and into your home. Fun Paper Friday Seo, Ki‐Weon, et al. "Drift of Earth's pole confirms groundwater depletion as a significant contributor to global sea level rise 1993–2010." Geophysical Research Letters 50.12 (2023): e2023GL103509. Contact us: Show Suppor...
Episode 375 - "Squeeze it shut" 26.01.2024 54:02
This week we keep talking about wells. It's all about casing, cementing, bottom hole assemblies, and wet underwear. Fun Paper Friday Bakkevig, Martha Kold, and Ruth Nielsen. "Impact of wet underwear on thermoregulatory responses and thermal comfort in the cold." Ergonomics 37.8 (1994): 1375-1389. Contact us: Show Support us on Patreon! www.dontpanicgeocast.com @dontpanicgeo show@dontpanicgeocast.c...
Episode 374 - "Until you Lick It" 20.01.2024 1:05:23
How do you drill a hole in the ground? Turns out that drilling wells is more complicated than you might think! Fun Paper Friday “Eating Fossils,” Jan Zalasiewicz, The Paleontological Association Newsletter, no. 96, November 2017. Contact us: Show Support us on Patreon! www.dontpanicgeocast.com @dontpanicgeo show@dontpanicgeocast.com John Leeman www.johnrleeman.com @geo_leeman Shannon Dulin @Shanno...
Episode 373 - "Tastes like Animal Crackers" 12.01.2024 1:02:51
This show got stuck in processing before sabbatical and did not automatically release, but here it is! This week we range over several topics on our minds while testing out english biscuits per a fun paper a few weeks ago. Also - do cats understand you but just don't care? Fun Paper Friday Do cats understand you, but just not care? Saito, Atsuko, et al. "Domestic cats (Felis catus) discriminate th...
Episode 372 - "The Rumors of My Death" 2024 Resolutions 05.01.2024 1:13:21
We're back for the 2024 season after our first ever sabbatical and we're ready to talk science, resolutions, and barbie. Fun Paper Friday Klamer, Katherine. "Analysis of Barbie medical and science career dolls: descriptive quantitative study." bmj 383 (2023). Contact us: Show Support us on Patreon! www.dontpanicgeocast.com @dontpanicgeo dontpanicgeocast@gmail.com John Leeman www.johnrleeman.com @g...
Episode 371 - "Have you tried licking it?" 15.09.2023 39:51
This week we talk about mudrock - which sounds pretty self explanatory, but of course geologists have made a complex classification scheme around it. Also we delve into if you should "sleep on it" when making big decisions. Fun Paper Friday Should you sleep on it when making an important decision? Dijksterhuis, Ap, et al. "On making the right choice: The deliberation-without-attention effect." Sci...
Episode 370 - "Siliceous Ooze" 08.09.2023 48:35
We said if you just pick up a rock, it is probably chert. How does this pervasive rock form? I mean we should have a good idea, right? Fun Paper Friday Time for tea and biscuits... and science. Jones, Ceri, and John Francis. "Direct Uptake of Nutrition and Caffeine Study (DUNCS): biscuit based comparative study." bmj 379 (2022). Contact us: Show Support us on Patreon! www.dontpanicgeocast.com @don...
Episode 369 - "Collect data in the field, do science at home" 25.08.2023 54:03
It takes a lot to plan field work, no matter if it is a day rock hounding or a week in the deep field. This week we talk about what you need to know! Fun Paper Friday You Can Just Put Up a Poster at IMCL and Nobody Will Stop You Contact us: Show Support us on Patreon! www.dontpanicgeocast.com SWUNG Slack @dontpanicgeo show@dontpanicgeocast.com John Leeman www.johnrleeman.com @geo_leeman Shannon Du...
Episode 368 - "It is Chert" 18.08.2023 52:56
You walk outside and find a rock - what is it? Well, that's probably a difficult answer. Also, how round are electrons and how do you even measure that? Fun Paper Friday Science News Article Roussy, Tanya S., et al. "An improved bound on the electron’s electric dipole moment." Science 381.6653 (2023): 46-50. Contact us: Show Support us on Patreon! www.dontpanicgeocast.com SWUNG Slack @dontpanicgeo...
Episode 367 - "Summer Break" 05.08.2023 54:29
Classes are about to start, so let's grab some gear and get to work! Field Supplies Field Kits Geological Field Sketches and Illustrations: A Practical Guide Fun Paper Friday What do grapes and microwaves have to do with advanced physics? Find out in this week's Fun Paper! Khattak, Hamza K., Pablo Bianucci, and Aaron D. Slepkov. "Linking plasma formation in grapes to microwave resonances of aqueou...
Episode 366 - "I Didn't Blow Away" 23.06.2023 52:05
This summer while Shannon has been at field camp we took a short hiatus, but we're back! Find out what happened with camp and more as well as what happens when you drop a spinning bottle of water. Fun Paper Friday Ehrenstein, David. "Controlling the Bounce of a Bottle." Physics 16 (2023): 102. Contact us: Show Support us on Patreon! www.dontpanicgeocast.com SWUNG Slack @dontpanicgeo show@dontpanic...
Episode 365 - Salinity Crisis "Smoking Various Meats and WWII" 09.06.2023 39:15
This week we talk about the Messinian Salinity Crisis and if your mom was right about cracking your knuckles. Fun Paper Friday Does cracking your knuckles destory your joints, improve joint health, or neither? Find out how one man has experiented on himself to find a potential answer. Unger, Donald L. "Does knuckle cracking lead to arthritis of the fingers?." Arthritis & Rheumatism: Official J...
Episode 364 - Geology of War "I'm glad I listen to this podcast" 13.05.2023 55:43
Join us as we explore how the intricate interplay between geology and military strategy has shaped history. We unravel the secrets behind the terrain's influence on battles, from its impact on troop movements to the potential for fortifications and natural defenses. Additionally, we investigate an intriguing question: What type of rock is the deadliest? We are astonished by the unexpected ways in...
Episode 363 - "National Natural Landmark" 05.05.2023 52:37
In this episode of the Don't Panic Geocast podcast, we continue our exploration of the Ice Age National Scenic Trail, immersing ourselves in its stunning landscapes and geological wonders. From glacial features to ancient river valleys, each step along the trail reveals new marvels waiting to be discovered. In the "Fun Paper Friday" segment, we dive into the intriguing world of gas marbles, unrave...
Episode 362 - "A lot of gray area in geology" 28.04.2023 46:42
In this episode of the Don't Panic Geocast, we dive into the fascinating world of dolomite, a mineral that is commonly found in sedimentary rocks. They discuss the unique characteristics of dolomite and the different ways in which it is formed. We also highlight a fun paper on equine dietary preferences, which explores the food choices of horses in different environments. The paper reveals interes...
Episode 361 - "No Ice Other than in Tea" Ice Age Trail Part 1 14.04.2023 1:01:05
John and Shannon are embarrassed to learn about a "new" national park - the Ice Age National Scenic Trail! Ice Age Trail Fun Paper Friday How can invisible creatures make their eyes invisible? What about their blood? What's going on in the ocean? Feller, Kate, and Megan Porter. "Photonic tinkering in the open ocean." Science 379.6633 (2023): 643-644. Contact us: Show Support us on Patreon! www.don...
Episode 360 - "Third and Fourth Order Nonsense" Lane's Balance 07.04.2023 43:14
This week we dive into rivers and what makes them erode, deposit, move and more using an engineering concept called Lane's balance. River Dynamics Fact Sheet Fun Paper Friday Lasers, high speed cameras, lightning, radio observations, and electric fields. It doesn't get better than this! Houard, Aurélien, et al. "Laser-guided lightning." Nature Photonics (2023): 1-5. Contact us: Show Support us on...
Episode 359 - "Standing Around Staring" 18.03.2023 37:24
We've been off air for a bit due to a giant move! Find out more! Fun Paper Friday Have we been leaving more that footprints on Mt. Everest? What about other planets? Humans are leaving behind a 'frozen signature' of microbes on Mount Everest Nicholas B. Dragone, L. Baker Perry, Adam J. Solon, Anton Seimon, Tracie A. Seimon, Steven K. Schmidt. Genetic analysis of the frozen microbiome at 7900 m a.s...
Episode 358 - "Put a pin in it" Surveillance Balloons 24.02.2023 57:11
There's been a lot of buzz about the PRC surveillance balloon, so we unpack the history of using balloons for science and for military. Fun Paper Friday Thanks to listener Xavier for this disturbing fun paper on privacy and tech repair. Ceci, Jason, Jonah Stegman, and Hassan Khan. "No Privacy in the Electronics Repair Industry." arXiv preprint arXiv:2211.05824 (2022). Contact us: Show Support us o...
Episode 357 - "Looks like the iron throne" 10.02.2023 42:44
Giant crystal in caves sounds more like a plot twist than a geological phenomena, but this week we learn how the Naica Mine crystals were formed! Fun Paper Friday Head, D., and T. Vanorio. "Effects of changes in rock microstructures on permeability: 3‐D printing investigation." Geophysical Research Letters 43.14 (2016): 7494-7502. Standford News Article Contact us: Show Support us on Patreon! www....
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