Épisodes

  • Episode 425 - "How jiggly are your bits?"
    Feb 6 2026

    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.
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    Show

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    John Leeman

    • www.johnrleeman.com
    • @geo_leeman

    Shannon Dulin

    • @ShannonDulin
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    59 min
  • Episode 424 - "Aunt Betty" Liquefaction
    Jan 30 2026

    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.
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    Show

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    • www.dontpanicgeocast.com
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    John Leeman

    • www.johnrleeman.com
    • @geo_leeman

    Shannon Dulin

    • @ShannonDulin
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    47 min
  • Episode 423 - "The rumors of our death"
    Jan 10 2026

    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.
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    Show

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    • www.dontpanicgeocast.com
    • @dontpanicgeo
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    John Leeman

    • www.johnrleeman.com
    • @geo_leeman

    Shannon Dulin

    • @ShannonDulin
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    1 h et 1 min
  • Episode 422 - "Melissa"
    Nov 7 2025

    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
    • Video Inside the Hurricane
    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 candy on Halloween." Journal of nutrition education and behavior 35.4 (2003): 207-209.
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    Show

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    • www.dontpanicgeocast.com
    • @dontpanicgeo
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    John Leeman

    • www.johnrleeman.com
    • @geo_leeman

    Shannon Dulin

    • @ShannonDulin
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    46 min
  • Episode 421 - "Come work for you"
    Sep 19 2025

    This week, we chat about our GEARS workshop that recently wrapped up, how it has evolved, and how it went!

    • GEARS Workshop
    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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    Show

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    • www.dontpanicgeocast.com
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    John Leeman

    • www.johnrleeman.com
    • @geo_leeman

    Shannon Dulin

    • @ShannonDulin
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    1 h et 6 min
  • Episode 420 - "Tourist Destination" Kamchatka Earthquake
    Sep 6 2025

    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.
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    Show

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    • www.dontpanicgeocast.com
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    John Leeman

    • www.johnrleeman.com
    • @geo_leeman

    Shannon Dulin

    • @ShannonDulin
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    46 min
  • Episode 419 - "Diamonds Everywhere" A States
    Aug 8 2025

    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.
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    Show

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    John Leeman

    • www.johnrleeman.com
    • @geo_leeman

    Shannon Dulin

    • @ShannonDulin
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    48 min
  • Episode 418 - "I like the crystal habit"
    Aug 1 2025

    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.
    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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    51 min