Episodios
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Gold has been a symbol of wealth, beauty, and power for millennia, but its importance extends far beyond jewelry and currency. From its formation deep in the Earth’s crust to its critical uses in electronics, medicine, and aerospace, this episode explores the fascinating journey of gold and why it continues to captivate us today.
Learn More:
Gold - Royal Society of Chemistry (https://www.rsc.org/periodic-table/element/79/gold)
Gold's Physical and Chemical Properties - Geology.com (https://geology.com/minerals/gold.shtml):
Gold Formation - USGS (https://pubs.usgs.gov/gip/2005/17/)
Orogenic Gold Deposits - Earth Science Reviews (https://www.sciencedirect.com/science/article/pii/S0012825217303743)
Gold Mining Methods - World Gold Council (https://www.gold.org/about-gold/gold-supply/gold-mining)
Artisanal and Small-Scale Gold Mining (ASM) - UNEP (https://www.unep.org/explore-topics/chemicals-waste/what-we-do/mercury/artisanal-and-small-scale-gold-mining-asgm)
Applications of Gold - Royal Society of Chemistry (https://www.rsc.org/periodic-table/element/79/gold#applications)
Gold in Medicine - The Lancet (https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(09)61335-2/fulltext)
Environmental Impacts of Gold Mining - Earthworks (https://earthworks.org/issues/gold-mining/)
Fun Paper Friday
Can pee be used to 3D print homes on the moon?
Pilehvar, Shima, et al. "Utilization of urea as an accessible superplasticizer on the moon for lunar geopolymer mixtures." Journal of Cleaner Production 247 (2020): 119177. (https://www.sciencedirect.com/science/article/pii/S0959652619340478)
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John Leeman
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Shannon Dulin
- @ShannonDulin (https://twitter.com/ShannonDulin) -
Ever wondered how silver journeys from ancient rock formations to the tech in your pocket? In this episode of Don't Panic Geocast, we dig deep into the fascinating world of silver—the metal that's shaped economies, inspired legends, and powers modern technology. From its formation in Earth’s crust to the precise science of extraction and refining, we’ll explore how silver’s unique properties make it indispensable in everything from solar panels to medical tools. Tune in to learn why this shiny element is more valuable—and more complicated—than you might think!
Hydrothermal Ore Deposits - Earth Science Reviews (https://www.sciencedirect.com/topics/earth-and-planetary-sciences/hydrothermal-ore-deposit)
Geology of Silver - US Geological Survey (https://pubs.usgs.gov/pp/1802/p/pp1802p.pdf)
Sedimentary Ore Deposits - Journal of Geology (https://www.journals.uchicago.edu/doi/10.1086/628614)
Mining Methods - Open Pit and Underground - Minerals Education Coalition (https://mineralseducationcoalition.org/mining-techniques/)
Underground Mining Techniques and Risks - World Coal Association (https://www.worldcoal.org/what-mining)
Froth Flotation Process - Journal of Chemical Engineering (https://www.journals.elsevier.com/journal-of-chemical-engineering)
The Leaching Process in Silver Extraction - Environmental Chemistry (https://www.environmentalchemistry.com)
Merrill-Crowe Process for Silver Recovery - Mining Engineering (https://www.miningeng.com/merrill-crowe-process)
Electrowinning Process in Silver Extraction - Metallurgy and Mining Review (https://www.metallurgymining.com)
Smelting and Refining of Silver - International Smelting Association (https://www.isa.com/silver-smelting)
Electrolytic Refining of Silver - American Journal of Chemistry (https://www.ajchem.com/silver-refining)
Conductivity of Silver in Electronics - IEEE Transactions on Electrical Engineering (https://www.ieee.org/electronics-conductivity)
Silver in Solar Panels - Solar Energy Journal (https://www.solarenergy.org/silver-panels)
Medical Applications of Silver - The Lancet (https://www.thelancet.com/silver-medicine)
History of Silver in Currency - Economic History Journal (https://www.ehjournal.com/silver-currency)
The Role of Silver in Photography - Journal of Photographic Science (https://www.photographicjournals.com)
Economic Significance of Silver - World Silver Survey (https://www.silverinstitute.org/silver-survey)
Environmental Impacts of Silver Mining - Environmental Science & Technology (https://www.estjournal.com/silver-mining-impacts)
Supply and Demand of Silver - International Silver Council (https://www.silvercouncil.org/supply-demand)
Antimicrobial Properties of Silver - Journal of Applied Microbiology
Fun Paper Friday
Can seeing a bad (dad) joke actually make you funnier? This week’s Fun Paper Friday dives into the surprising effects of both funny and unfunny examples on our ability to create humor. It turns out that even groan-worthy jokes can fuel creativity—though they might make you work harder for the punchline!
Shin, Hyelim, et al. "Creative fixation is no laughing matter: The effects of funny and unfunny examples on humor production." The Journal of Creative Behavior 54.2 (2020): 487-494. (https://core.ac.uk/download/pdf/345087091.pdf)
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- @ShannonDulin (https://twitter.com/ShannonDulin) -
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This week, we dive into the fascinating world of coal—its origins, types, and the role it has played in shaping economies, past and present. We discuss coal’s formation in ancient swampy environments, the journey from mining to electricity generation, and the transition we’re witnessing as the world moves toward renewable energy sources. We wrap up with a Fun Paper Friday that challenges the classic "Infinite Monkeys Theorem"—could monkeys really type out Shakespeare if given enough time?
How Coal Forms and Coal Types - World Coal Association (https://www.worldcoal.org/coal/what-coal)
Energy Density of Coal Types - Hypertextbook (https://hypertextbook.com/facts/2003/JuliyaFisher.shtml)
Mining Methods and Processing - National Academies (https://www.nap.edu/read/11977/chapter/5)
Coal Transportation - U.S. Energy Information Administration (EIA) (https://www.eia.gov/coal/transportation/)
Coal’s Role in the Industrial Revolution - History.com (https://www.history.com/topics/industrial-revolution/coal)
Global Coal Power Statistics - Statista (https://www.statista.com/statistics/859266/number-of-coal-power-plants-by-country/)
Future of Coal in Energy Transitions - International Energy Agency (IEA) (https://www.iea.org/topics/coal)
Fun Paper Friday
Can monkeys really type out Shakespeare? This study explores the probability of typing coherent text with a finite number of monkeys and limited time. Spoiler: even with thousands of monkeys, the odds are astronomically low, revealing the true limits of randomness.
Woodcock, Stephen, and Jay Falletta. "A numerical evaluation of the Finite Monkeys Theorem." Franklin Open (2024): 100171. (https://www.sciencedirect.com/science/article/pii/S2773186324001014)
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Throughout human history, certain minerals have held immense power, shaping economies, societies, and entire civilizations. In this economic rocks series, John and Shannon discuss how essential minerals like salt, gold, and coal influenced historical events and continue to impact modern geopolitics. This week we start with salt and how it is essential to many aspects of our day to day.Learn MoreHistory of Salt in Ancient Civilizations (https://www.historycooperative.org/salt-history-ancient-civilizations/) - Learn how salt became an essential part of trade, diet, and religion in ancient China, Egypt, and Rome:contentReference[oaicite:0]{index=0}.The Role of Salt in the Roman Empire (https://www.learnancientrome.com/importance-of-salt-in-ancient-rome) - Discover how the Roman Empire used salt as currency and a political tool to control its territories:contentReference[oaicite:1]{index=1}.The Impact of the Salt Trade in West Africa (https://www.ancient-origins.net/salt-trade-west-africa) - Learn how salt was traded for gold and helped build the Ghana and Mali empires, creating a network of trade routes that shaped the region’s history:contentReference[oaicite:2]{index=2}.Fun Paper FridayThis week's Fun Paper Friday features a study on the leaf-mimicking abilities of Boquila trifoliolata. The vine is capable of changing the shape and size of its leaves to resemble those of neighboring plants, potentially as a form of camouflage against herbivores. But the most surprising part? It can even mimic artificial plastic leaves. This finding challenges existing theories that leaf mimicry is driven solely by chemical signaling or genetic exchange between plants, suggesting instead that Boquila may possess a form of plant vision through specialized light-sensitive cells called “plant ocelli.” This discovery opens new possibilities for understanding plant sensory and adaptive behaviors.White, J., & Yamashita, F. (2022). Boquila trifoliolata mimics leaves of an artificial plastic host plant. Plant Signaling & Behavior, 17(1), e1977530. (https://doi.org/10.1080/15592324.2021.1977530)Contact us:ShowSupport us on Patreon! (https://www.patreon.com/dontpanicgeo)www.dontpanicgeocast.com (http://www.dontpanicgeocast.com)@dontpanicgeo (https://twitter.com/dontpanicgeo)[email protected] 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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In our 400th episode, we take a moment to reflect on some of our favorite past episodes and Fun Paper Fridays that have brought joy, knowledge, and a good laugh to the show. From memorable guests to quirky science papers, this episode is a tribute to everything that makes the Don't Panic Geocast special. Join us for this nostalgia-packed episode where we look back at the highlights of 399 episodes!
Highlighted Episodes
Episode 350 - "Borehole to Hell" (https://www.dontpanicgeocast.com/350)
Episode 49 - "Would it blow your mind if I told you Africa is 14x larger than Greenland?" (https://www.dontpanicgeocast.com/49)
Episode 50 - "Some serious geometric voodoo" Projections Part 2 (https://www.dontpanicgeocast.com/50)
Episode 364 - Geology of War "I'm glad I listen to this podcast" (https://www.dontpanicgeocast.com/364)
Episode 6 - "What if you calibrated your candles differently?" (https://www.dontpanicgeocast.com/6)
Episode 358 - "Put a pin in it" Surveillance Balloons (https://www.dontpanicgeocast.com/358)
Episode 16 - "We are scared" Nature Calls (https://www.dontpanicgeocast.com/16)
Top Titles
Episode 52 - "You pay for significant digits" (https://www.dontpanicgeocast.com/52)
Episode 4 - "Is that cumulonimbus cloud storage?" Data Backups (https://www.dontpanicgeocast.com/4)
Favorite Fun Papers
Kuna, Václav M., and John L. Nábělek. "Seismic crustal imaging using fin whale songs." Science 371.6530 (2021): 731-735. (https://www.dontpanicgeocast.com/301)
Does removing something take more brain power than adding something? Adams, Gabrielle S., et al. "People systematically overlook subtractive changes." Nature 592.7853 (2021): 258-261. (https://www.dontpanicgeocast.com/324)
Science makes you feel stupid and that's okay!Schwartz, Martin A. "The importance of stupidity in scientific research." Journal of Cell Science 121.11 (2008): 1771-1771. (https://www.dontpanicgeocast.com/335)
Beaty, Chester B. "Great big boulders I have known." Geology 17.4 (1989): 349-352. (https://www.dontpanicgeocast.com/327)
Winter is coming, but why? Orbital mechanics to the rescue! Paradise, Adiv, et al. "The Long Night: Modeling the Climate of Westeros." arXiv preprint arXiv:1903.12195 (2019). (https://www.dontpanicgeocast.com/214)
Where do you go to find mythical creatures? There's a paper for that! Beconytė, Giedrė, Agnė Eismontaitė, and Jovita Žemaitienė. "Mythical creatures of Europe." Journal of Maps 10.1 (2014): 53-60. (https://www.dontpanicgeocast.com/200)
Yanai, Itai, and Martin Lercher. "The two languages of science." Genome Biology 21.1 (2020): 1-9. (https://www.dontpanicgeocast.com/343)
Meyer-Rochow, V. B., & Gal, J. (2003). Pressures produced when penguins pooh?calculations on avian defaecation. Polar Biology, 27(1), 56–58. http://doi.org/10.1007/s00300–003–0563–3 (https://www.dontpanicgeocast.com/19)
Dirksen, Neele, et al. "Learned control of urinary reflexes in cattle to help reduce greenhouse gas emissions." Current Biology 31.17 (2021): R1033-R1034. (https://www.dontpanicgeocast.com/350)
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Artificial Intelligence (AI) is making its way into academic research and writing, offering a range of tools that can help streamline workflows, enhance creativity, and improve productivity. In this episode, John and Shannon dive into some of the AI tools they’ve been experimenting with and discuss broader questions about fairness, disclosure, and the evolving role of AI in academia.
Elsevier’s Policy on Generative AI in Writing (https://www.elsevier.com/about/policies-and-standards/the-use-of-generative-ai-and-ai-assisted-technologies-in-writing-for-elsevier)
Research Rabbit (https://www.researchrabbit.ai/) - AI-powered tool for literature discovery.
GitHub Co-pilot (https://github.com/features/copilot) - AI coding assistant.
Elicit (https://elicit.org/) - AI for automating literature reviews and generating research insights.
Magic To-Do (https://magictodo.app/) - AI-based task management tool.
Autodraw (https://www.autodraw.com/) - AI-powered drawing tool.
Fun Paper Friday Summary:
So if AI takes over the world, what would it take to destory it? A solar flare should do it, and maybe us, in.
The superstorms from space that could end modern life (https://www.bbc.com/future/article/20240815-miyake-events-the-giant-solar-superstorms-that-could-rock-earth) -
This week, we delve into the fascinating world of the ancient dwelling mounds—terps—of the northern Netherlands. These man-made mounds served as elevated homes for communities living in low-lying, flood-prone areas. Join us as we explore the geology of these mounds, why they were essential for survival, and how modern technology is used to monitor soil subsidence and preserve these unique archaeological sites.
Learn More:
Wierdenland Museum (https://www.museum.nl/en/museum-wierdenland-ezinge): Information about the museum and its exhibits on dwelling mounds.
Late-Holocene sea-level reconstruction and sedimentological data (https://www.cambridge.org): An in-depth academic article on the evolution of the coastal landscape and sea-level changes influencing terp construction.
Fun Paper Friday Summary:
In this episode’s Fun Paper Friday, we discuss B.F. Skinner’s “Pigeons in a Pelican.” The paper recounts the story of "Project Pigeon," a World War II experiment that explored using pigeons to guide missiles by pecking at visual targets. Though the project faced skepticism and was never implemented in combat, it highlighted the potential of animal training and laid a foundation for behaviorist research. The study is a testament to how creative ideas can push the boundaries of science, even if they seem outlandish at first.
Skinner, B. F. (1960). Pigeons in a Pelican. (https://www.appstate.edu/~steelekm/classes/psy3202/Documents/Skinner1960.pdf) -
This week John and Shannon summarize the GEARS 2024 workshop, lessons learned, and talk about a record air pressure that was just a fluke.
Fun Paper Friday
Bureau of Meteorology says quality checks reveal air pressure record not broken, miscalculations published online (https://www.abc.net.au/news/2024-07-05/bureau-of-meterology-air-pressure-miscalculation/104063982)
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John Leeman
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Shannon Dulin
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Learn about the explosion at Yellowstone's Biscuit Basin site and what it means for the park. We also talk about drunk fruit flies and what they are teaching us about alcoholism.
Fun Paper Friday
Heberlein, Ulrike. "Genetics of alcohol-induced behaviors in Drosophila." Alcohol Research & Health 24.3 (2000): 185. (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6709738/)
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This week we look at a geological oddity in Turkmenistan and see how getting a puppy can give you the blues.
Video of the Burning Crater (https://www.youtube.com/watch?v=cWUoAoeJb08)
Fun Paper Friday
Ståhl, Aada, et al. "Development and validation of the puppy blues scale measuring temporary affective disturbance resembling baby blues." npj Mental Health Research 3.1 (2024): 27. (https://www.nature.com/articles/s44184-024-00072-z)
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John Leeman
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Shannon Dulin
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We went to watch Twisters and review it from the standpoint of two people who have chased storms professionally. Also what do philosophers have to say about the original movie and its mythological reconsiliations?
Fun Paper Friday
King, Geoff. "The scientist as pioneer hero: Hollywood's mythological reconciliations in twister and contact." Science as Culture 8.3 (1999): 371-379. (https://www.tandfonline.com/doi/pdf/10.1080/09505439909526552)
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This week we talk about when and how things get revised from classes to papers to theories. Also we read a paper about a curious cure for poisoning.
Fun Paper Friday
Sasanami, Misa, et al. "Oral ethanol treatment for ethylene glycol intoxication." Cureus 12.12 (2020). (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7827791/)
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This week we discuss JMARS and how you can explore the planets at home with just a few clicks of the mouse. Field camp is almost over and we'll be back to our regular shorts soon!
JMARS Site (https://jmars.asu.edu/)
Fun Paper Friday
What happens when scientists look for a fast cup of cold brew coffee? Ultrasonic experiments of course!
Chiu, Shih-Hao, et al. "Coffee brewing sonoreactor for reducing the time of cold brew from several hours to minutes while maintaining sensory attributes." Ultrasonics Sonochemistry 106 (2024): 106885. (https://www.sciencedirect.com/science/article/pii/S1350417724001330)
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John Leeman
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What is a flume and how do sedimentologists used them to understand depositional systems? This and how likely you are to be bitten by a rattlesnake if you step on it in this summer's first Don't Panic Summer Short!
emriver (https://emriver.com/)
St. Anthony Falls Lab (https://cse.umn.edu/safl)
Fun Paper Friday
WPR News Article (https://www.wpr.org/news/lessons-from-rattlesnake-class-in-the-american-southwest?fbclid=IwZXh0bgNhZW0CMTAAAR3PXdbQEYyVnWJKba9TmWMKYTrxqVRmAEoIGk8MxD-flosadCIsOIaZaJw_aem_Ad2f0zNQP5XNQ_SL-sTD7K4Ggj6lLdzo42bV5ZxiE6CjwmQLNy5L1U83-5zK6BT28Ay5xlwoB_GZIp7FEgrWNikS)
Morris, M. Cale. "Rattlesnakes in the Classroom: A Research-based Model for
Educational Outreach Programs." Biology of Rattlesnakes II (https://basisseniorprojects.com/phoenix/files/2023/03/BOR-II-Final_Morris.pdf)
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John Leeman
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Stop losing power and data in the field. John and Shannon discuss the new FieldVolt open power standard.
FieldVolt Standard (https://leemangeophysicalllc.github.io/knowledgebase/FieldVolt/field_volt_standard/)
Fun Paper Friday
Dean, Isabelle, and Michael T. Siva-Jothy. "Human fine body hair enhances ectoparasite detection." Biology letters 8.3 (2012): 358-361. (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3367735/pdf/rsbl20110987.pdf)
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John Leeman
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Shannon Dulin
- @ShannonDulin (https://twitter.com/ShannonDulin) -
This week John and Shannon talk about what some of the weird weather radar terms that get thrown around mean and how you can use them to keep up with storms impacting you. Then things get morbid with a mouse experiment that ended in an idiocrasy style extinction.
Fun Paper Friday
Calhoun, John B. "Death squared: the explosive growth and demise of a mouse population." (1973): 80-88. (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1644264/pdf/procrsmed00338-0007.pdf)
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John Leeman
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Shannon Dulin
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John went to the Geoprobe open house to look at drilling rigs and then we discuss the optimum way to plan a large number of Christmas parties.
Earth Day Google Doodle (https://doodles.google/doodle/earth-day-2024/)
Geoprobe (https://geoprobe.com/)
Fun Paper Friday
Grüneberg, Reuben. "Hospital Christmas parties." British Medical Journal 281.6256 (1980): 1667. (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1715684/pdf/brmedj00052-0011.pdf)
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Shannon Dulin
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What's tiny, rocky, and alive? Forams! Learn about forams and what diseases James Bond may get while traveling to study them.
Fun Paper Friday
Graumans, Wouter, William JR Stone, and Teun Bousema. "No time to die: An in-depth analysis of James Bond's exposure to infectious agents." Travel medicine and infectious disease 44 (2021): 102175. (https://www.sciencedirect.com/science/article/pii/S1477893921002167)
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John and Shannon both traveled to see the great eclipse of 2024 and share their experiences this week as well as talk about one of those rare times when ice is not a mineral.
Fun Paper Friday
We always talk about ice being a mineral, but what about when it isn't?
Rosu-Finsen, Alexander, et al. "Medium-density amorphous ice." Science 379.6631 (2023): 474-478. (https://www.science.org/doi/full/10.1126/science.abq2105)
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John Leeman
- www.johnrleeman.com (http://www.johnrleeman.com)
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Shannon Dulin
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This week we interview YouTube science creator, science writer, and communicator Alexis Dahl to learn about the rocks of Michigan's UP and how scientists can do a better job of sharing what they do.
Alexis' YouTube Channel (https://www.youtube.com/AlexisDahl)
Alexis' Website (https://www.alexisdahl.com/)
Fun Paper Friday
What should you drink after fondue to prevent "chesse baby" feelings?
Heinrich, Henriette, et al. "Effect on gastric function and symptoms of drinking wine, black tea, or schnapps with a Swiss cheese fondue: randomised controlled crossover trial." BMJ 341 (2010). (https://www.bmj.com/content/bmj/341/bmj.c6731.full.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) - Mostrar más
