

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.
Episodes
Mentioned books

Jan 29, 2022 • 59min
Episode 317 - "Is your tinfoil hat the same as mine?"
There are lots of rumored precursors to earthquakes - everything from dogs acting strange to flashes of light in the sky. This week we take a look at a few of these and discuss how possible or impossible they may be.
Flashbulb Memory Effect
Earthquake Lights
Animal Behavior
Temperature Changes
Gas Emissions
Electromagnetic Changes
Fun Paper Friday
What is hip? When will it be hip again? Will Shannon and John stop saying hip?
Golman, Russell, Aditi Jain, and Sonica Saraf. "Hipsters and the Cool: A Game Theoretic Analysis of Social Identity, Trends and Fads." arXiv preprint arXiv:1910.13385 (2019).
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John Leeman
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Shannon Dulin
@ShannonDulin

Jan 15, 2022 • 52min
Episode 316 - "A centimeter is good enough"
This week we dive into differential GPS and WAAS - how we can tell exactly where we are on the planet.
WAAS
Differential GPS
Sparkfun Facet
Fun Paper Friday
What can we learn from a glowing jellyfish brain? Turns out, quite a bit!
Phys.org article
Weissbourd, Brandon, et al. "A genetically tractable jellyfish model for systems and evolutionary neuroscience." Cell 184.24 (2021): 5854-5868.
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John Leeman
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Shannon Dulin
@ShannonDulin

Jan 7, 2022 • 50min
Episode 315 - "Tombstones"
Glaciers are huge, weird, and complex systems. This week we talk about some weird glacial terminology and we jump the frog with this fun paper.
Moulin
Serac
Weertman Tombstone
Jökulhlaup
Fun Paper Friday
Astley, Henry C., et al. "Chasing maximal performance: a cautionary tale from the celebrated jumping frogs of Calaveras County." Journal of Experimental Biology 216.21 (2013): 3947-3953.
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John Leeman
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Shannon Dulin
@ShannonDulin

Jan 1, 2022 • 1h 7min
Episode 314 - "We Did Pretty Good"
How did you do on your 2021 resolutions? What are you going to do in 2022?
John
More smaller, allowed breaks
Focus and completion of tasks
Hit the Gym
Get an IFR rating
Be less reactive when appropriate
Shannon
say NO even more! Make a priority of staying within my boundaries (70/15/15)
publish the rest of my dissertation (2 articles)
make my webpage(s) and keep them updated
Fun Paper Friday
Marlow, Robin, and Dora Wood. "Ghost in the machine or monkey with a typewriter—generating titles for Christmas research articles in The BMJ using artificial intelligence: observational study." bmj 375 (2021).
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John Leeman
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Shannon Dulin
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Dec 24, 2021 • 47min
Episode 313 - "Starts with Dyson"
Dyson Sphere
Space Mirrors
Nuke Mars
Fun Paper Friday
Did you get your beauty sleep? If not, others can probably tell!
Axelsson, John, et al. "Beauty sleep: experimental study on the perceived health and attractiveness of sleep deprived people." Bmj 341 (2010).
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John Leeman
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Shannon Dulin
@ShannonDulin

Dec 10, 2021 • 49min
Episode 312 - "Atmospheric Deodorant"
This week John and Shannon talk about ways we could use engineering to save or destroy the planet.
Stratospheric Injection
Ocean Fertilization
Increased Weathering
Fun Paper Friday
When it comes to doing dumb things - are men more likley to participate than women?
Lendrem, Ben Alexander Daniel, et al. "The Darwin Awards: sex differences in idiotic behaviour." Bmj 349 (2014).
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Shannon Dulin
@ShannonDulin

Dec 4, 2021 • 46min
Episode 311 - "You know the answer once you know the answer"
This week learn how to make strat columns based on the magnetic direction of rocks! It's time to learn about magnetostratigraphy.
Magnetostratigraphy
Fun Paper Friday
How did the human hand evolve? These authors make no bones about it.
Press Release
Williams-Hatala, Erin Marie, et al. "The manual pressures of stone tool behaviors and their implications for the evolution of the human hand." Journal of Human Evolution 119 (2018): 14-26.
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Shannon Dulin
@ShannonDulin

Nov 27, 2021 • 52min
Episode 310 - "Paul Bunyan's Potty"
Canyonlands National Park is a beautiful and large display of sedimentary processes, impacts, and more. Learn about the features of this park and how they got there in this week's show!
ASU Virtual Field Trip
Paul Bunyan's Potty
Fun Paper Friday
What if your dog could call you? Would they? Once scientist dared to ask the question.
Hirskyj-Douglas, Ilyena, Roosa Piitulainen, and Andrés Lucero. "Forming the Dog Internet: Prototyping a Dog-to-Human Video Call Device." Proceedings of the ACM on Human-Computer Interaction 5.ISS (2021): 1-20.
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John Leeman
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Shannon Dulin
@ShannonDulin

Nov 20, 2021 • 51min
Episode 309 - "Assume a Spherical Chicken"
A recent publication tried to determine if strange folded glasses found in the Atacama Desert formed by an extraterrestrial process. Turns out, mineraology and microscopy hold the key!
Schultz, Peter H., et al. "Widespread glasses generated by cometary fireballs during the late Pleistocene in the Atacama Desert, Chile." Geology (2021).
Fun Paper Friday
Can chicken de-feathering be used as a wind speed proxy? Some old experiments might shed some light on the subject.
Vonnegut, Bernard. "Chicken Plucking as Measure of Tornado Wind Speed." Weatherwise 28.5 (1975): 217-217.
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Shannon Dulin
@ShannonDulin

Nov 12, 2021 • 45min
Episode 308 - "Clay is kind of a trash can" Cements
This week John and Shannon discuss sedimentary rocks and what holds them together. Cements can be made of many different materials and don't change the name of the rock!
Fun Paper Friday
What can we learn from ducks drafting while swimming?
Yuan, Zhi-Ming, et al. "Wave-riding and wave-passing by ducklings in formation swimming." Journal of Fluid Mechanics 928 (2021).
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John Leeman
www.johnrleeman.com
@geo_leeman
Shannon Dulin
@ShannonDulin