

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

Apr 14, 2023 • 1h 1min
Episode 361 - "No Ice Other than in Tea" Ice Age Trail Part 1
John and Shannon are embarrassed to learn about a "new" national park - the Ice Age National Scenic Trail!
Ice Age Trail
Fun Paper Friday
How can invisible creatures make their eyes invisible? What about their blood? What's going on in the ocean?
Feller, Kate, and Megan Porter. "Photonic tinkering in the open ocean." Science 379.6633 (2023): 643-644.
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
@ShannonDulin

Apr 7, 2023 • 43min
Episode 360 - "Third and Fourth Order Nonsense" Lane's Balance
This week we dive into rivers and what makes them erode, deposit, move and more using an engineering concept called Lane's balance.
River Dynamics Fact Sheet
Fun Paper Friday
Lasers, high speed cameras, lightning, radio observations, and electric fields. It doesn't get better than this!
Houard, Aurélien, et al. "Laser-guided lightning." Nature Photonics (2023): 1-5.
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
@ShannonDulin

Mar 18, 2023 • 37min
Episode 359 - "Standing Around Staring"
We've been off air for a bit due to a giant move! Find out more!
Fun Paper Friday
Have we been leaving more that footprints on Mt. Everest? What about other planets?
Humans are leaving behind a 'frozen signature' of microbes on Mount Everest
Nicholas B. Dragone, L. Baker Perry, Adam J. Solon, Anton Seimon, Tracie A. Seimon, Steven K. Schmidt. Genetic analysis of the frozen microbiome at 7900 m a.s.l., on the South Col of Sagarmatha (Mount Everest). Arctic, Antarctic, and Alpine Research, 2023; 55 (1) DOI: 10.1080/15230430.2023.2164999
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
@ShannonDulin

Feb 24, 2023 • 57min
Episode 358 - "Put a pin in it" Surveillance Balloons
There's been a lot of buzz about the PRC surveillance balloon, so we unpack the history of using balloons for science and for military.
Fun Paper Friday
Thanks to listener Xavier for this disturbing fun paper on privacy and tech repair.
Ceci, Jason, Jonah Stegman, and Hassan Khan. "No Privacy in the Electronics Repair Industry." arXiv preprint arXiv:2211.05824 (2022).
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
@ShannonDulin

Feb 10, 2023 • 43min
Episode 357 - "Looks like the iron throne"
Giant crystal in caves sounds more like a plot twist than a geological phenomena, but this week we learn how the Naica Mine crystals were formed!
Fun Paper Friday
Head, D., and T. Vanorio. "Effects of changes in rock microstructures on permeability: 3‐D printing investigation." Geophysical Research Letters 43.14 (2016): 7494-7502.
Standford News Article
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
@ShannonDulin

Feb 3, 2023 • 39min
Episode 356 - "They'll find me laying in a graben"
This week we talk about basin and range topography, horsts, grabens, and more! Also how similar is your mouth bacteria to someone you kissed?
John McPhee Book
USGS Basin and Range Report
Fun Paper Friday
Kort, Remco, et al. "Shaping the oral microbiota through intimate kissing." Microbiome 2.1 (2014): 1-8.
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
@ShannonDulin

Jan 27, 2023 • 53min
Episode 355 - "Best First Week of Class Ever"
This week John and Shannon discuss some mysterious rocks whose extraterrestrial origin is still debated and if growing a beard is a good defense against a punch.
Arstechnica article on Hypatia Stone
Fun Paper Friday
Beseris, E. A., S. E. Naleway, and D. R. Carrier. "Impact protection potential of mammalian hair: Testing the pugilism hypothesis for the evolution of human facial hair." Integrative organismal biology 2.1 (2020): obaa005.
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
@ShannonDulin

Jan 21, 2023 • 33min
Episode 354 - "That's Gneiss"
New York City is a sprawling metropolis, but the design of the city is heavily influenced by the geology of this tortured patch of rock. This week we talk about it and what rocks you'll see as you stroll the city streets.
Manhattan Schist
Inwood Marble
Fordham Gneiss
Fun Paper Friday
Cameras left behind by explorers over 80 years ago found and may unlock secrets of glacial movement
Article
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
@ShannonDulin

Jan 13, 2023 • 1h 14min
Episode 353 - "We Didn't Do So Well"
Shannon's Resolutions
Streamline Digital Workflows
Read a lot! (and use goodreads)
Take a sabbatical
John's Resolutions
Read 24 Books
Cut carbs and meal prep lunch
Take quarterly vacations
Systemize, delegate, react
Fun Paper Friday
Do you have a funny walk? It could be healthy!
Gaesser, Glenn A., David C. Poole, and Siddhartha S. Angadi. "Quantifying the benefits of inefficient walking: Monty Python inspired laboratory based experimental study." bmj 379 (2022).
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
@ShannonDulin

Dec 23, 2022 • 51min
Episode 352 - "Why are things so heavy in the future?"
Shannon went to a workshop on determining the provenance of sediments using heavy elements, optical microscopes, and Raman spectra!
Raman Spectroscopy
Fun Paper Friday
Do dogs lie when they mark?
McGuire, B., et al. "Urine marking in male domestic dogs: honest or dishonest?." Journal of Zoology 306.3 (2018): 163-170.
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
@ShannonDulin