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PODCAST

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.

science natural sciences

All Episodes

1:06:26

Episode 421 - "Come work for you"

Don"t Panic Geocast ·

2025/09/19

This week, we chat about our GEARS workshop that recently wrapped up, how it has evolved, and how it went!GEARS Workshop (https://leemangeophysicalllc.github.io/GEARS/2025/2025_summer_home.html) Fun Paper Friday Hejnol, Andreas, and Mark Q. Martindale. "The mouth, the anus, and the blastopore—open questions about questionable openings." Animal Evolution: Genomes, Fossils, and Trees (2009): 33-40.

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46:03

Episode 420 - "Tourist Destination" Kamchatka Earthquake

Don"t Panic Geocast ·

2025/09/06

This week we are back and discussing the recent large earthquake in Russia!Fun Paper Friday Is that viral video of a fault rupture form a security camera real? This paper checks it out. Kearse, Jesse, and Yoshihiro Kaneko. "Curved Fault Slip Captured by CCTV Video During the 2025 M w 7.7 Myanmar Earthquake." The Seismic Record 5.3 (2025): 281-288. (https://pubs.geoscienceworld.org/ssa/tsr/article/5/3/281/659624/Curved-Fault-Slip-Captured-by-CCTV-Video-During) Contact us: Show Support us on Patreon

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48:19

Episode 419 - "Diamonds Everywhere" A States

Don"t Panic Geocast ·

2025/08/08

We're hitting the open road — geologically speaking. This episode kicks off our new state-by-state series covering the most fascinating, scenic, or just plain weird geologic stops in the U.S. We’re going alphabetically (because of course we are), starting with Alabama, Alaska, and Arkansas. Some sites we've visited, others are firmly on our dream list, but every pick is guaranteed to bring a bit of science to your next adventure.Alabama Cheaha Mountain Cathedral Caverns Alaska Wrangell-St. Elias

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50:55

Episode 418 - "I like the crystal habit"

Don"t Panic Geocast ·

2025/08/01

What makes a mineral a favorite? In this fun and down-to-earth episode, John and Shannon swap stories about the minerals they love most — and why. Along the way, they unpack cool crystal habits, formation environments, fieldwork memories, and the aesthetic appeal of minerals from museum specimens to muddy boots.Shannon shares her appreciation for: Hematite – With its metallic luster and planetary significance. Goethite – A subtle but important iron oxide-hydroxide. Smithsonite – Beautiful colors

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1:04:56

Episode 417 - "Who are you?"

Don"t Panic Geocast ·

2025/07/11

We're back from summer break - Shannon taught field camp, John travelled for work and got hailed on, and more!John’s Hail Storm (https://youtube.com/shorts/aLb-P7HFL-Y) Fun Paper Friday How does modern AI stack up against a cognition test designed for humans? Dayan, Roy, Benjamin Uliel, and Gal Koplewitz. "Age against the machine—susceptibility of large language models to cognitive impairment: cross sectional analysis." bmj 387 (2024).

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54:59

Episode 416 - "Life is a Physics Exam"

Don"t Panic Geocast ·

2025/05/16

This week we talk about how we power our instruments in the field and all of the weird and wonderful ways they fail. Including getting turned into charcoal by lightning!Fun Paper Friday Why does ketchup splatter? Find out! Arstechnica Article (https://arstechnica.com/science/2022/11/the-physics-of-keeping-those-last-bits-of-ketchup-from-splattering/) Cuttle, Callum, and Christopher W. MacMinn. "Dynamics of compression-driven gas-liquid displacement in a capillary tube." Physical Review Letters

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48:12

Episode 415 - "Fiat 500 Volcanic Bomb"

Don"t Panic Geocast ·

2025/04/25

This week we talk hail, Vesuvius, volcanic bombs, and vitrified brains.Scandone, Roberto, Lisetta Giacomelli, and Mauro Rosi. "Death, Survival and Damage during the 79 AD Eruption of Vesuvius which destroyed Pompeii and Herculaneum." J. Res. Didact. Geogr 2 (2019): 5-30. (https://www.researchgate.net/publication/337768981_Death_Survival_and_Damage_during_the_79_AD_Eruption_of_Vesuvius_which_destroyed_Pompeii_and_Herculaneum) Fun Paper Friday An amazing new finding shows that brains were vitrified

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1:05:01

Episode 414 - "Closed Because of Landslide"

Don"t Panic Geocast ·

2025/04/18

Shannon's class took a trip to study catestrophic sedimentation... and they found it! John switched back to a Mac after 5 years. Join us for these and other exciting updates!Fun Paper Friday Find out how alcohol and an eye puffer machine cominbed with magnets can teach us about where our motor skills reside in the brain. Johansson, Fredrik, et al. "Alcohol impairs learning and timing of conditioned eyeblink responses." Brain Research 1854 (2025): 149545.

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57:30

Episode 413 - "Waterfalls I Have Loved"

Don"t Panic Geocast ·

2025/04/04

Turner Falls, Oklahoma A rare waterfall that grows outward due to travertine deposition instead of eroding backward. Formed by spring-fed Honey Creek flowing through Ordovician limestone, creating massive travertine deposits. Pe'ePe'e Falls, Hawai'i (Big Island) ~80 ft falls in downtown Hilo, part of the Wailuku River flowing between Mauna Kea and Mauna Loa. Carved into 10,000-year-old lava flows with subsequent flows creating the Boiling Pots — vertical and horizontal lava tubes.

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48:42

Episode 412 - "Unpopular Flavor of Capri Sun"

Don"t Panic Geocast ·

2025/03/08

This week we talk about snow forecasting as the winter season starts to wrap up and try to figure out if you're really happier in the morning or not!Fun Paper Friday https://mentalhealth.bmj.com/content/28/1/e301418 (https://mentalhealth.bmj.com/content/28/1/e301418) Contact us: Show Support us on Patreon! (https://www.patreon.com/dontpanicgeo) www.dontpanicgeocast.com (http://www.dontpanicgeocast.com) @dontpanicgeo (https://twitter.com/dontpanicgeo) dontpanicgeocast@gmail.com John Leeman -

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45:27

Episode 411 - "TSA Does Not Care About Your Data "

Don"t Panic Geocast ·

2025/02/14

Ever wondered how geologists figure out when a landslide happened? Or how ancient river terraces and glacial deposits get dated? This week, we dive into the detective work behind dating geomorphic features! 🌍🔬 From tree rings to cosmic rays, we explore the fascinating methods geologists use to reconstruct Earth’s history and assess natural hazards. Why Dating Landslides and Other Features is Hard Landslides can reactivate multiple times, fluvial deposits get reworked, and glacial features have

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48:18

Episode 410 - "GEARS OIL UTEP"

Don"t Panic Geocast ·

2025/02/07

We just wrapped up our first-ever on-site GEARS Workshop at UTEP and it was a massive success! 🎉 Tune in as we break down the highlights, what we learned, and how this hands-on geoscience training is evolving for the future.Fun Paper Friday Can paranormal lights actually be tied to earthquakes? Hough, Susan E. "Haunted Summerville: Ghostly Lights or Earthquake Lights?." (https://pubs.geoscienceworld.org/ssa/srl/article-pdf/doi/10.1785/0220240442/7096603/srl-2024442.1.pdf) Contact us: Show Support

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1:07:10

Episode 409 - "Resolutions"

Don"t Panic Geocast ·

2025/01/24

This week, it's time for our 2025 resolutions show, where we see how we can improve this year and discuss everything that's changed in the past year!Fun Paper Friday We are all overloaded with surveys and requests, but can a chocolate bar increase the response rates? Jamtvedt, Gro, et al. "Chocolate bar as an incentive did not increase response rate among physiotherapists: a randomised controlled trial." BMC research notes 1 (2008): 1-4.

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41:23

Episode 408 - "Everywhere there's cottonwood trees"

Don"t Panic Geocast ·

2025/01/17

This week we wrap up our finding faults show started oh so long ago! Learn how to identify faults in the field and then relax with a coffee with a physicist! A perfectly spherical coffee on a frictionless plane that is!Fun Paper Friday Bossart, Aleksi, Romain Fleury, and Benjamin Apffel. "Science of a coffee cup: a physicist walks into a bar..." arXiv preprint arXiv:2501.01180 (2025). (https://arxiv.org/abs/2501.01180) Contact us: Show Support us on Patreon

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1:12:22

Episode 407 - "If you like dragons, that's important...

Don"t Panic Geocast ·

2024/12/27

This week, we’re thrilled to welcome Joshua Pearce to the show! We dive into the world of open-source hardware for academic labs, the challenges and rewards of open-sourcing projects, and the exciting opportunities it creates for researchers and the general public alike. Tune in for a fascinating discussion about innovation, making, and the future of accessible technology!Joshua Pearce Open-Source Lab: How to Build Your Own Hardware and Reduce Research Costs

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57:26

Episode 406 - "Taking in all the really interesting...

Don"t Panic Geocast ·

2024/12/21

Shannon went to AGU and we're updated on the meeting and what cool new science things she saw! Fun Paper Friday He, Yu, et al. "Superionic iron alloys and their seismic velocities in Earth’s inner core." Nature 602.7896 (2022): 258-262. (https://www.nature.com/articles/s41586-021-04361-x) Contact us: Show Support us on Patreon! (https://www.patreon.com/dontpanicgeo) www.dontpanicgeocast.com (http://www.dontpanicgeocast.com) @dontpanicgeo

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56:20

Episode 405 - "Getting Tensor"

Don"t Panic Geocast ·

2024/12/07

Faults are fractures in the Earth's crust where movement has occurred, creating features that are critical to understanding geological processes. In this episode, we explore how to recognize fault zones in the field, examine their widths at different depths, and analyze the breakage patterns and deformation features that define them.Definition of faults and why they matter in geological studies: USGS - Earthquake Glossary (https://earthquake.usgs.gov/learn/glossary/?term=fault) Importance of

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50:22

Episode 404 - "So Many Paperclips"

Don"t Panic Geocast ·

2024/11/29

Lithium, often called "white gold," is a critical resource powering modern technologies like electric vehicles (EVs), renewable energy storage, and more. This week, we explore lithium's geological formation, mining, processing, and its growing importance in the energy revolution. We also dive into exciting developments in Arkansas, which could make the U.S. a major player in domestic lithium production.Learn More: Pegmatite Geology - USGS (https://pubs.usgs.gov/pegmatite-geology) Lithium in Clays -

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50:12

Episode 403 - "My Dad Caught my Mom's Pants on Fire"

Don"t Panic Geocast ·

2024/11/22

Gold has been a symbol of wealth, beauty, and power for millennia, but its importance extends far beyond jewelry and currency. From its formation deep in the Earth’s crust to its critical uses in electronics, medicine, and aerospace, this episode explores the fascinating journey of gold and why it continues to captivate us today. Learn More: Gold - Royal Society of Chemistry (https://www.rsc.org/periodic-table/element/79/gold) Gold's Physical and Chemical Properties - Geology.com

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44:58

Episode 402 - "Shoes in a dryer on turbo"

Don"t Panic Geocast ·

2024/11/15

Ever wondered how silver journeys from ancient rock formations to the tech in your pocket? In this episode of Don't Panic Geocast, we dig deep into the fascinating world of silver—the metal that's shaped economies, inspired legends, and powers modern technology. From its formation in Earth’s crust to the precise science of extraction and refining, we’ll explore how silver’s unique properties make it indispensable in everything from solar panels to medical tools. Tune in to learn why this shiny

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423 results

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