John Leeman and Shannon Dulin

Don't Panic Geocast

Science EN ↓ 433 episodes

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

Science

Podcast website

www.dontpanicgeocast.com

Latest episode

Jun 26, 2026

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Episodes

Episode 306 - "8 Degrees is a lot!" PETM 22.10.2021

What happens when the Earth is drastically warmer than it is now? How can it get that way? Join us to learn about the PETM and what it could mean for our future. Fun Paper Friday Can the Drake equation be applied to love? One author thinks so! Link is to a video of a talk on the paper - the original PDF seems to have disappeared from the university website. Backus, P. (2009). Why I don’t have a gi...

Episode 305 - "Trovant down by the river" 15.10.2021

Trovants are a mysterious rock formation and we try to understand them this week! Science Alert Article When on Earth Article Wikipedia Article Geology In Article Fun Paper Friday Tired of zoom meetings? Let's read a paper about them! Shockley, Kristen M., et al. "The fatiguing effects of camera use in virtual meetings: A within-person field experiment." Journal of Applied Psychology 106.8 (2021):...

Episode 304 - "Bog Clothes" with Dr. Andy Elwood-Madden 08.10.2021

Andy Elwood-Madden X-Ray Diffraction Reynolds Cup Fun Paper Friday How many legs does it take to freak you out? Vetter, Richard S. "Arachnophobic entomologists: when two more legs makes a big difference." American Entomologist 59.3 (2013): 168-175. Contact us: Show Support us on Patreon! www.dontpanicgeocast.com SWUNG Slack @dontpanicgeo show@dontpanicgeocast.com John Leeman www.johnrleeman.com @g...

Episode 303 - "But do you need it?" 24.09.2021

Keeping instruments safe in the field in hard. This week John talks about his favorite disguise for instruments and telemetry. Fun Paper Friday Can a photo and some machine learning predict how corrupt you are as a politician? Blavatskyy, Pavlo. "Obesity of politicians and corruption in post‐Soviet countries." Economics of Transition and Institutional Change 29.2 (2021): 343-356. Contact us: Show...

Episode 302 - "Geophysics is Batteries" 17.09.2021

Getting power to things in the field is difficult and more complex than you'd think. This week we discuss a few of the many problems you are likely to face and ways we have fought them. Fun Paper Friday Reinventing the wheel happens a lot - but how often does it get published? This week we examine an example by looking at a paper that rediscovered the integral. Tai, Mary M. "A mathematical model f...

Episode 301 - "Lodestone" 11.09.2021

Magnetism is a mysterious topic and it took a long time for us humans to understand just the basics. This week we look at the history of magnetism! Fun Paper Friday Can whale calls be useful for seismologists? Find out in this week's Fun Paper! Kuna, Václav M., and John L. Nábělek. "Seismic crustal imaging using fin whale songs." Science 371.6530 (2021): 731-735. Contact us: Show Support us on Pat...

Episode 300 - "Rock can also act as a fluid" 04.09.2021

EPISODE 231 - "PRISON TOOLS" DR. MATT HALL EPISODE 243 - "I WANT FOUR AWESOME SEASONS" EPISODE 270 - "WHY GOD MADE THE EVENING SHIFT" STEVE PILTZ EPISODE 287 - "CARTOONIST IN WORD FORM" GARY MCMANUS EPISODE 271 - "GUESS AGAIN DUMMY" RYAN MAY EPISODE 280 - "RED SKY IN THE MORNING" WEATHER PROVERBS EPISODE 262 - "MY TEDDY BEAR AND ROSARY" EPISODE 221 - "I DON'T THINK LIKE THAT" PLOTTING EPISODE 230...

Episode 299 - "Counterfeit Consciousness" 21.08.2021

The GEARS workshop is over and we discuss what lessons were learned and how it went. Then we find out how some clever computer scientists found plagiarization in the literature. Fun Paper Friday Cabanac, Guillaume, Cyril Labbé, and Alexander Magazinov. "Tortured phrases: A dubious writing style emerging in science. Evidence of critical issues affecting established journals." arXiv preprint arXiv:2...

Episode 298 - "Little Nerd Arms" 13.08.2021

It's hot! Learn about wet bulb temperature and what it means for your heat-stress this summer! It involves a lot of swinging of wet socks! Fun Paper Friday Tamm, Sidney L. "Defecation by the ctenophore Mnemiopsis leidyi occurs with an ultradian rhythm through a single transient anal pore." Invertebrate Biology 138.1 (2019): 3-16. Contact us: Show Support us on Patreon! www.dontpanicgeocast.com SWU...

Episode 297 - "Acid Gel" Shell Formation 23.07.2021

How Seashells are Made Johnson, Adam B., Nina S. Fogel, and J. David Lambert. "Growth and morphogenesis of the gastropod shell." Proceedings of the National Academy of Sciences 116.14 (2019): 6878-6883. Addadi, Lia, et al. "Mollusk shell formation: a source of new concepts for understanding biomineralization processes." Chemistry–A European Journal 12.4 (2006): 980-987. Fun Paper Friday Thampi, Ni...

Episode 296 - "Explosive Erosion" 09.07.2021

Does the earth change rapidly or slowly? We discuss the competing philosophies and the evolution of.... well, the end of the road for your food! Fun Paper Friday Hejnol, Andreas, and José M. Martín-Durán. "Getting to the bottom of anal evolution." Zoologischer Anzeiger-a Journal of Comparative Zoology 256 (2015): 61-74. Contact us: Show Support us on Patreon! www.dontpanicgeocast.com SWUNG Slack @...

Episode 295 - "Touch the rocks" 03.07.2021

Shannon is back from field camp (and another trip) and wants to talk about digital skills. Is field camp even necessary? Fun Paper Friday Fukada, Eiichi. "Piezoelectricity of wood." Journal of the Physical Society of Japan 10.2 (1955): 149-154. Contact us: Show Support us on Patreon! www.dontpanicgeocast.com SWUNG Slack @dontpanicgeo show@dontpanicgeocast.com John Leeman www.johnrleeman.com @geo_l...

Episode 294 - "enormous catastrophe" 19.06.2021

Earthquake shaking is often described on a "felt like" scale known as the Mercalli intensity scale. This episode we delve into the confusing history of the scale and what it really means. Fun Paper Friday Can your pasta be packed more efficiently? It can if it turns into its final shape during cooking! Tao, Ye, et al. "Morphing pasta and beyond." Science Advances 7.19 (2021): eabf4098. ## Contact...

Episode 293 - "Hot Hot Field Camp" Spontaneous Potential 12.06.2021

What is spontaneous potential? It's an inexpensive technique to learn even more about the porosity, composition, and permeability of rock and soil. Fun Paper Friday Does your cat sit in boxes? Turns out, there's proof of why and that a cat's visual perception is quite sophisticated. Smith, Gabriella E., Philippe A. Chouinard, and Sarah-Elizabeth Byosiere. "If I fits I sits: A citizen science inves...

Episode 292 - "Magic Math Stick" 29.05.2021

This was supposed to be a show on Spontaneous Potential, but we'll get to that next week! We have a potpourri of things to cover and hope you'll enjoy our derailed train! Fun Paper Friday Telescopes for seals? It's true! Mauck, Björn, et al. "How a harbor seal sees the night sky." Marine mammal science 21.4 (2005): 646-656. Contact us: Show Support us on Patreon! www.dontpanicgeocast.com SWUNG Sla...

Episode 291 - "Haven't you seen Dante's Peak?" 22.05.2021

Mt. St. Helens was a huge event in 1980. This week, 41 years later, we discuss the events leading up to the eruption and what happened! Fun Paper Friday * Turpin, Martin Harry, et al. "Bullsh!? Ability as an Honest Signal of Intelligence." Evolutionary Psychology 19.2 (2021): 14747049211000317. Contact us: Show Support us on Patreon! www.dontpanicgeocast.com SWUNG Slack @dontpanicgeo show@dontpani...

Episode 290 - "COAL!" 15.05.2021

This week it's all about coal - what is it, where did it form, and how do we use it! Fun Paper Friday Can seismometers be used to spy on industrial processes? Guenaga, David L., et al. "Seismically Detecting Nuclear Reactor Operations Using a Power Spectral Density (PSD) Misfit Detector." Bulletin of the Seismological Society of America (2021). Contact us: Show Support us on Patreon! www.dontpanic...

Episode 289 - "Soil Teapot" 01.05.2021

How do geysers work? Learn more this week! Old Faithful Fun Paper Friday The title says it all in this week's Fun Paper! Wang, Lu, Zdenek Sofer, and Martin Pumera. "Will any crap we put into graphene increase its electrocatalytic effect?." ACS nano 14.1 (2020): 21-25. Contact us: Show Support us on Patreon! www.dontpanicgeocast.com SWUNG Slack @dontpanicgeo show@dontpanicgeocast.com John Leeman ww...

Episode 288 - "95% Chance of Chert" Mineral Identification 16.04.2021

How do you identify a mineral? We talk about our favorite ways to identify minerals! Fun Paper Friday How does heavy water taste? Will it kill you? Find out by reading this week's Fun Paper Friday! Abu, Natalie Ben, et al. "Sweet taste of heavy water." Communications Biology 4.1 (2021): 1-10. Contact us: Show Support us on Patreon! www.dontpanicgeocast.com SWUNG Slack @dontpanicgeo show@dontpanicg...

Episode 287 - "Cartoonist in Word Form" Gary McManus 10.04.2021

Gary McManus joins us to talk about state climatology and extremes in Oklahoma! Gary Mesonet Fun Paper Friday Hurricanes in space? It's raining electrons in this week's fun paper Friday! Zhang, Qing-He, et al. "A space hurricane over the Earth’s polar ionosphere." Nature communications 12.1 (2021): 1-10. Contact us: Show Support us on Patreon! www.dontpanicgeocast.com SWUNG Slack @dontpanicgeo sho...

Episode 286 - "Big Sandbox for Adults" Maciej Obryk, Kate Allstadt, Thomas Rapstine 03.04.2021

Thanks to Dr. Maciej Obryk, Dr. Kate Allstadt, and Dr. Thomas Rapstine for joining us to talk about the USGS experimental flume! Flume Experiment Videos Dr. Maciej Obryk Dr. Kate Allstadt Dr. Thomas Rapstine Fun Paper Friday This week we see how an undergarment can become a lifesaving bit of technology. EBbra Contact us: Show Support us on Patreon! www.dontpanicgeocast.com SWUNG Slack @dontpanicge...

Episode 285 - "We're not going to tell you how to make it" Geology Field Kit 26.03.2021

Field Kit Sokkia Notebook Holster/Backpack Handlens Hammer Belt Pocket Transit Gilson Grain Size Card Acid Bottle Pocket Knife Pencils/Lead Protractor Ruler Combo Streak Plate Mohs Picks Fun Paper Friday What can we learn about the Earth's magnetic field from tree rings? Cooper, Alan, et al. "A global environmental crisis 42,000 years ago." Science 371.6531 (2021): 811-818. Science Mag Article Con...

Episode 284 - "Dijon or Yellow" Geomajik Box 20.03.2021

What's in the box? Geophones Load Cell Resistivity Setup Color Magnetometer Accelerometer Turbidity Sensor Water Velocity Sensor Fun Paper Friday What happens when no AI research can be reproduced? Any angry site to shame those authors! One researcher’s mission to encourage reproducibility in machine learning Contact us: Show Support us on Patreon! www.dontpanicgeocast.com SWUNG Slack @dontpanicge...

Episode 283 - "There are spectrograms" 07.03.2021

This week we talk about flow regimes in streams, more bedforms, and then wrap it up with a discussion of what crocodiles sound like after breathing helium! Fun Paper Friday Thanks to listener Teresa for this week's fun paper! Reber, Stephan A., et al. "A Chinese alligator in heliox: formant frequencies in a crocodilian." Journal of Experimental Biology 218.15 (2015): 2442-2447. Contact us: Show Su...

Episode 282 - "Antidunes" 02.03.2021

This week we talk all about sediment bedforms and everyone's favorite - antidunes! Watch John's Flume Experiments from 11 years ago Froude Number Fun Paper Friday Smarandache, Florentin. Funny Problems. Infinite Study, 2000. Contact us: Show Support us on Patreon! www.dontpanicgeocast.com SWUNG Slack @dontpanicgeo show@dontpanicgeocast.com John Leeman www.johnrleeman.com @geo_leeman Shannon Dulin...

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