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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

53:20

Episode 435 - “FIRE THE LASERS!”

Don"t Panic Geocast ·

2026/10/02

Jezero crater is a really interesting place on Mars - that's why we have landed so many spacecraft in the area. This week we talk about some exciting findings from the crater as well as a modern day twist on a modest proposal.Jezero Crater Fun Paper Friday In a twist on an old tale, this authors examine how applying ethical matricies to AI driven questions can still result in questionable outcomes - like grinding up the geezers. Keyes, Os, Jevan Hutson, and Meredith Durbin. "A

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56:04

Episode 434 - "darkness sometimes brings profundity"

Don"t Panic Geocast ·

2026/09/19

How do you know if your cool new result is real or just some artifact? Is it data or noise, and are those not always so dissimilar? This week we tackle that along with how good your BS detector is.Fun Paper Friday Is your BS just BS or fake profundity? Pennycook, Gordon, et al. "On the reception and detection of pseudo-profound bullshit." Judgment and Decision making 10.6 (2015): 549-563. Contact us: Show Support us on

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48:30

Episode 433 - "2 totally useless degrees "

Don"t Panic Geocast ·

2026/09/11

Wildfires can change the landscape and have geologic implications. Also, what makes your sneakers squeak, and what does that have to do with earthquakes?Fun Paper Friday A peek into the physics of squeaky sneakers Contact us: Show Support us on Patreon! www.dontpanicgeocast.com @dontpanicgeo dontpanicgeocast@gmail.com John Leeman www.johnrleeman.com @geo_leeman Shannon Dulin @ShannonDulin

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1:09:16

Episode 432 - "Like walking around inside someone's...

Don"t Panic Geocast ·

2026/08/28

This week we recap the GEARS 2026 workshop, our return from summer break, how hot it has been, and chat about floods of the 1300's in Europe. GEARS Workshop Fun Paper Friday Kiss, Andrea, et al. "Cascading continental-scale floods across Europe in 1342–1343." Nature (2026): 1-8. Contact us: Show Support us on Patreon! www.dontpanicgeocast.com @dontpanicgeo dontpanicgeocast@gmail.com John Leeman www.johnrleeman.com @geo_leeman Shannon Dulin @ShannonDulin

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32:53

Episode 431 - Philippines Earthquake

Don"t Panic Geocast ·

2026/06/26

There was a very large earthquake in the Philippines - John and Shannon break down what you need to know. We also explore the question - what's the deal with birds?Fun Paper Friday Baldassarre, Daniel T. "What’s the Deal with Birds." Sci J Res Rev 2 (2020): 1-4. Contact us: Show Support us on Patreon! www.dontpanicgeocast.com @dontpanicgeo dontpanicgeocast@gmail.com John Leeman www.johnrleeman.com @geo_leeman Shannon Dulin @ShannonDulin

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1:02:47

Episode 430 - "I am being ambushed"

Don"t Panic Geocast ·

2026/06/05

This week John and Shannon discuss the book "Slow Productivity", our other summer reading lists, and if swearing makes your exercise sessions better.Fun Paper Friday Jiannine, Lia, and Jose Antonio. "The effects of cursing on exercise performance." Journal of Exercise Physiology Online 26.5 (2023). Contact us: Show Support us on Patreon! www.dontpanicgeocast.com @dontpanicgeo dontpanicgeocast@gmail.com John Leeman www.johnrleeman.com @geo_leeman Shannon

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48:52

Episode 429 - "Summer Shorts" GPR

Don"t Panic Geocast ·

2026/05/29

This week we talk about GPR or ground penetrating radar as Shannon considers buying one and asks what to look for.Fun Paper Friday Do trees glow before lightning strikes? McFarland, P. J., et al. "Corona discharges glow on trees under thunderstorms." Geophysical Research Letters 53.4 (2026): e2025GL119591. Contact us: Show Support us on Patreon! www.dontpanicgeocast.com @dontpanicgeo dontpanicgeocast@gmail.com John Leeman www.johnrleeman.com @geo_leeman Shannon

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56:42

428: Episode 428 - "Pedagogical Gold"

Don"t Panic Geocast ·

2026/05/15

This week we talk about how you should approach an outcrop in the field for the first time. What do you look for? What kind of notes do you take? This and more field camp tips plus a discussion about the rheology of pasta sauce.Fun Paper Friday Busiello, Daniel Maria, Vincenzo Maria Schimmenti, and Ivan Di Terlizzi. "Physical properties of a perfect pasta sauce." Physics Today 2026 (2026). Contact us: Show Support us on

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58:49

Episode 427 - "Feeding Tubes Yo!"

Don"t Panic Geocast ·

2026/03/28

This week we help a listener identify their bizarre fossil - and it's a trace fossil! Learn all about it and find out if you'd remember more if we were funnier!Trace Fossil Dictionary Shannon’s Favorite Trackway Asterosoma Fun Paper Friday Would you remember more about science if your teachers presented it in a funny way? Frank, Alexandra L., et al. "Wit meets wisdom: the relationship between satire and anthropomorphic humor on scientists' likability and

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42:27

Episode 426 - "Hard K Sound is Hilarious"

Don"t Panic Geocast ·

2026/03/13

This week, we continue to talk about temperature with a discussion of temperature scales, where they came from, and why there are so many!Fun Paper Friday Kaiser, Caspar, and Andrew J. Oswald. "The scientific value of numerical measures of human feelings." Proceedings of the National Academy of Sciences 119.42 (2022): e2210412119. Contact us: Show Support us on Patreon! www.dontpanicgeocast.com @dontpanicgeo dontpanicgeocast@gmail.com John

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58:48

Episode 425 - "How jiggly are your bits?"

Don"t Panic Geocast ·

2026/02/06

What is temperature? Why do we care? Where did all of these temperature scales come from? This week, we find out!Fun Paper Friday Di Lorenzo, Emilia, et al. "Periodic cooking of eggs." Communications Engineering 4.1 (2025): 1-10. Contact us: Show Support us on Patreon! www.dontpanicgeocast.com @dontpanicgeo dontpanicgeocast@gmail.com John Leeman www.johnrleeman.com @geo_leeman Shannon Dulin @ShannonDulin

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46:32

Episode 424 - "Aunt Betty" Liquefaction

Don"t Panic Geocast ·

2026/01/30

This week it's all about liquefaction as we explore why some caskets are above ground and how some cars get half way buried.Flame Structure Sand Boil Quicksand Fun Paper Friday Can creatively shaped pasta fold itself when cooked? Tao, Ye, et al. "Morphing pasta and beyond." Science Advances 7.19 (2021): eabf4098. Contact us: Show Support us on Patreon! www.dontpanicgeocast.com @dontpanicgeo dontpanicgeocast@gmail.com John

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1:01:13

Episode 423 - "The rumors of our death"

Don"t Panic Geocast ·

2026/01/10

We are back after a very challenging 2025 but don't panic - there is a plan! Fun Paper Friday Taloni, Andrea, Vincenzo Scorcia, and Giuseppe Giannaccare. "Large language model advanced data analysis abuse to create a fake data set in medical research." JAMA ophthalmology 141.12 (2023): 1174-1175. (https://pmc.ncbi.nlm.nih.gov/articles/PMC10636646/) Contact us: Show Support us on Patreon! (https://www.patreon.com/dontpanicgeo) www.dontpanicgeocast.com (http://www.dontpanicgeocast.com) @dontpanicgeo

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46:02

Episode 422 - "Melissa"

Don"t Panic Geocast ·

2025/11/07

We're still here - it has just been a very difficult time, but this week we're talking about Hurricane Melissa and Halloween Candy!Hurricane Melissa (https://en.wikipedia.org/wiki/Hurricane_Melissa) Video Inside the Hurricane (https://www.youtube.com/watch?v=O_LIuonLTiQ) Fun Paper Friday Trick or Treat! Maybe it should be Treat or Toy? Find out in this week's Fun Paper! Schwartz, Marlene B., Eunice Y. Chen, and Kelly D. Brownell. "Trick, treat, or toy: children are just as likely to choose toys as

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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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437 results

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