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Don't Panic Geocast

John Leeman and Shannon Dulin
Don't Panic Geocast
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5 de 421
  • Episode 419 - "Diamonds Everywhere" A States
    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 National Park Mendenhall Glacier Arkansas Crater of Diamonds State Park Blanchard Springs Caverns Fun Paper Friday Frost, Mungo, et al. "Diamond precipitation dynamics from hydrocarbons at icy planet interior conditions." Nature astronomy 8.2 (2024): 174-181. (https://www.osti.gov/servlets/purl/2324804) Contact us: Show Support us on Patreon! (https://www.patreon.com/dontpanicgeo) www.dontpanicgeocast.com (http://www.dontpanicgeocast.com) @dontpanicgeo (https://twitter.com/dontpanicgeo) [email protected] John Leeman - www.johnrleeman.com (http://www.johnrleeman.com) - @geo_leeman (https://twitter.com/geo_leeman) Shannon Dulin - @ShannonDulin (https://twitter.com/ShannonDulin)
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  • Episode 418 - "I like the crystal habit"
    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 and a fascinating history in ore geology. John counters with: Ulexite – “TV rock,” with fiber-optic properties that never fail to wow. Uraninite – A dense, radioactive reminder of geologic power and energy. Tourmaline – A colorful, complex favorite of mineral collectors and scientists alike. Fun Paper Friday James, C. W., et al. "A nanosecond-duration radio pulse originating from the defunct Relay 2 satellite." The Astrophysical Journal Letters 987.1 (2025): L16. (https://iopscience.iop.org/article/10.3847/2041-8213/ade3d3/pdf) Contact us: Show Support us on Patreon! (https://www.patreon.com/dontpanicgeo) www.dontpanicgeocast.com (http://www.dontpanicgeocast.com) @dontpanicgeo (https://twitter.com/dontpanicgeo) [email protected] John Leeman - www.johnrleeman.com (http://www.johnrleeman.com) - @geo_leeman (https://twitter.com/geo_leeman) Shannon Dulin - @ShannonDulin (https://twitter.com/ShannonDulin)
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  • Episode 417 - "Who are you?"
    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). (https://www.bmj.com/content/bmj/387/bmj-2024-081948.full.pdf?ref=labnotes.org) Contact us: Show Support us on Patreon! (https://www.patreon.com/dontpanicgeo) www.dontpanicgeocast.com (http://www.dontpanicgeocast.com) @dontpanicgeo (https://twitter.com/dontpanicgeo) [email protected] John Leeman - www.johnrleeman.com (http://www.johnrleeman.com) - @geo_leeman (https://twitter.com/geo_leeman) Shannon Dulin - @ShannonDulin (https://twitter.com/ShannonDulin)
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  • Episode 416 - "Life is a Physics Exam"
    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 130.11 (2023): 114001. (https://arxiv.org/pdf/2112.12898) Contact us: Show Support us on Patreon! (https://www.patreon.com/dontpanicgeo) www.dontpanicgeocast.com (http://www.dontpanicgeocast.com) @dontpanicgeo (https://twitter.com/dontpanicgeo) [email protected] John Leeman - www.johnrleeman.com (http://www.johnrleeman.com) - @geo_leeman (https://twitter.com/geo_leeman) Shannon Dulin - @ShannonDulin (https://twitter.com/ShannonDulin)
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  • Episode 415 - "Fiat 500 Volcanic Bomb"
    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 or turned to glass during the nearly 2000 year old eruption of Vesuvius. Giordano, Guido, et al. "Unique formation of organic glass from a human brain in the Vesuvius eruption of 79 CE." Scientific Reports 15.1 (2025): 5955. (https://www.nature.com/articles/s41598-025-88894-5.pdf) Mt Vesuvius (https://en.wikipedia.org/wiki/Mount_Vesuvius) Plinian (https://en.wikipedia.org/wiki/Plinian_eruption) Contact us: Show Support us on Patreon! (https://www.patreon.com/dontpanicgeo) www.dontpanicgeocast.com (http://www.dontpanicgeocast.com) @dontpanicgeo (https://twitter.com/dontpanicgeo) [email protected] John Leeman - www.johnrleeman.com (http://www.johnrleeman.com) - @geo_leeman (https://twitter.com/geo_leeman) Shannon Dulin - @ShannonDulin (https://twitter.com/ShannonDulin)
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Sobre 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.
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