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Understand All: Daily Summaries Delivered
by Aaron Barlow
Welcome to Understand All, the podcast where curiosity leads and learning follows! I dive into everything from the secrets of the universe to untold stories from the past. Whether you’re a trivia buff, a history enthusiast, or just looking to spark some intellectual excitement, my episodes are crafted just for you. I aim to make every topic relatable and fascinating, perfect for anyone who loves to think and learn.Join our community of curious minds! I hope to drop new episodes twice a day to keep you curious and excited! Start and end your day with a burst of knowledge by subscribing to Understand All. Let's explore the world together—one episode at a time!
Latest Episodes
The most recent episodes — sign up to get AI-powered summaries of each one.
- Today5 min
Business Plot: The Alleged Coup to Oust FDR
What if a decorated Marine was quietly approached to front a plan to pressure Franklin D. Roosevelt out of power? In this episode, we dig into the Business Plot, the alleged 1933 coup attempt, the veterans’ movement, the money, the testimony, and why the McCormack–Dickstein Committee couldn’t quite let the story die. Listen now to understand one of the strangest challenges to American democracy before it disappears into history.In this episode, we dig into the **Business Plot**, the alleged 1933–1934 coup attempt to push **Franklin D. Roosevelt** from power. We follow **Smedley Butler’s** sworn testimony, the rumored use of a veterans’ movement, and the congressional investigation that left the story hanging between warning sign and historical mystery.• How the Business Plot fit into New Deal-era politics • Why Smedley Butler became the key witness • What the McCormack–Dickstein Committee actually found • Why newspapers split over the story • What this episode says about elite power and democracy**Chapters** The Cold Open: A War Hero Gets Recruited The Alleged Plan to Oust FDR Inside the McCormack–Dickstein Committee Media Skepticism and Public Doubt Why the Business Plot Still Matters**Related resources** [Listen to more history episodes](#) [Read Butler’s testimony overview](#) [Business Plot on Wikipedia](https://en.wikipedia.org/wiki/Business_Plot) [Connecticut History on Gerald MacGuire](https://connecticuthistory.org/gerald-macguire-and-the-plot-to-overthrow-franklin-roosevelt)If this episode sharpened your view of power, history, and the New Deal, share it with a friend and leave a review so more listeners can find it.
- 2 days ago7 min
Cymothoa exigua: The Tongue-Eating Parasite That Becomes the Tongue
What kind of parasite eats a fish’s tongue and then stays behind as the tongue? In this episode, we unpack Cymothoa exigua, the tongue-eating parasite, how it gets into fish through the gills, why the host can often keep feeding, and what this bizarre case reveals about parasite biology and evolution—listen now before this one gets buried under a hundred half-true versions of the story.Cymothoa exigua, the tongue-eating parasite, sounds like a horror story — but it’s a real parasitic isopod that can enter a fish through the gills, feed on the tongue, and then function as the tongue itself. In this episode, we unpack the biology, the weird evolutionary trade-offs, and why this fish parasite is famous in marine biology.• Cymothoa exigua is the only known parasite that physically replaces a host organ in form and function. • It mostly targets marine fish like snappers in the eastern Pacific. • Infected fish can often keep feeding, even while their mouths and gills are under chronic stress. • Humans are not known hosts, and infected fish are generally considered safe to eat.Chapter labels: The Fish With a Missing Tongue How the Parasite Gets In Why the Fish Still Survives What This Means for Marine EcosystemsRelated resources: [More marine biology episodes](/shows/marine-biology) [Transcript](/transcripts/cymothoa-exigua) External: [Wikipedia](https://en.wikipedia.org/wiki/Cymothoa_exigua) External: [Ocean Conservancy on tongue-eating lice](https://oceanconservancy.org/blog/2022/04/28/tongue-eating-louse-eats-tongues/)If this episode made you rethink what parasites can do, share it with a friend and subscribe for more strange-but-true science stories.
- 3 days ago4 min
Encephalitis lethargica: The Sleeping Epidemic That Vanished
A real epidemic once left people trapped in a strange half-awake state, sometimes frozen in place, and then seemed to disappear before doctors could fully explain it. In this episode on encephalitis lethargica, the sleeping sickness epidemic, we trace the mystery, the Spanish flu connection, the autoimmune theories, and the survivors who later developed post-encephalitic parkinsonism — listen now to hear why this vanished disease still matters.Encephalitis lethargica, the “sleeping sickness” epidemic, was a global neurological mystery that left some people profoundly sleepy, others frozen in place, and many survivors with long-term movement and psychiatric symptoms. In this episode, we explore the rise, disappearance, and lasting scientific mystery of encephalitis lethargica, including its debated link to the Spanish flu and its relevance to modern autoimmune encephalitis research.• How encephalitis lethargica spread worldwide between 1915 and 1930 • Why it caused lethargy, movement disorders, and post-encephalitic parkinsonism • Why the Spanish flu theory remains controversial • What L-DOPA revealed about frozen brain circuits • Why EL still matters to neurology and pandemic preparedness The sleeping epidemic Vienna and Constantin von Economo Spanish flu, infection, and autoimmunity Frozen bodies and L-DOPA awakenings Why it vanished Related resources and links: Internal: [Episode transcript](/episodes/encephalitis-lethargica) External: [Brain review on encephalitis lethargica](https://academic.oup.com/brain/article/140/8/2246/3970828), [PMC sleep research review](https://pmc.ncbi.nlm.nih.gov/articles/PMC7448964) If this episode changed how you think about the brain, send it to a friend and leave a review so more people can find it.
- 1 weeks ago3 min
Bal des Ardents: The Masked Ball That Nearly Burned the King
One torch, one masked costume, and a royal ball in 1393 nearly ended with the King of France burning alive. In this episode, we unpack the Bal des Ardents, Charles VI, medieval Paris, and the fire that turned a court celebration into a political nightmare—listen now to find out how it happened and why it still matters.In this episode, we unpack the Bal des Ardents, the 1393 masked ball in Paris where a royal celebration turned into a fire disaster that nearly killed King Charles VI of France. We trace how a courtly entertainment, a flammable costume, and one careless torch exposed the danger, politics, and fragility inside the French court.• The Bal des Ardents took place on 28 January 1393 at the Hôtel Saint-Pol in Paris. • Charles VI was already coping with mental illness, which made the event politically explosive. • Four nobles died when their wild men costumes caught fire. • The Duchess of Berry helped save the king, while one dancer escaped by jumping into wine. • The fire became a symbol of courtly excess and instability in medieval France.Chapter Labels:The Royal BallCharles VI’s Fragile CourtThe Torch That Changed EverythingFire, Panic, and SurvivalWhy the Ball Became a Political ScandalRelated resources and links:• Internal: [More episodes on medieval history](/topics/medieval-history) • External: [BnF: Jean Froissart’s Chronicles](https://essentiels.bnf.fr/fr/livre-feuilleter/03e271f1-c313-4130-bb2f-f65edb3fde9d-jean-froissart-chroniques) • External: [HistoryExtra on the Ball of the Burning Men](https://www.historyextra.com/period/medieval/ball-of-burning-men-history-facts-what-happened/)If you enjoyed this episode, share it with a friend who loves strange history, and follow the show for more stories from the past that still feel uncomfortably modern.
- 1 weeks ago6 min
Fritz Haber: Feeding Billions, Fueling Chemical War
One chemist helped turn air into fertilizer for billions of people — and then helped turn the same science toward poison gas. In this episode, we unravel Fritz Haber, the Haber-Bosch process, the rise of synthetic ammonia, and the grim birth of chemical warfare. Listen now to hear how one invention could feed the world and reshape war at the same time.Fritz Haber’s story is one of science’s biggest double edges: the ammonia synthesis behind the Haber-Bosch process helped make fertilizer at industrial scale and feed billions, but the same chemistry also fed explosives and chemical warfare. In this episode, we unpack how one chemist changed global agriculture, war, and the ethics of scientific progress.• The Haber-Bosch process turned atmospheric nitrogen into ammonia, transforming fertilizer production and modern food systems. • That same industrial chemistry also helped Germany produce nitrates for explosives during World War I. • Fritz Haber became a central figure in chemical warfare, including the first large-scale chlorine gas attacks. • His legacy still shapes debates about dual-use science, scientific responsibility, and technology ethics.Chapters:Why fertilizer starts with air How the Haber-Bosch process works From ammonia to explosives Chemical warfare and chlorine gas The legacy of dual-use scienceRelated resources and links:Internal: Episode transcript Internal: More episodes on science and ethics External: Nobel Prize biography of Fritz Haber External: Science History Institute profile on the Haber-Bosch process External: BBC coverage of Haber’s pesticide legacyIf this episode changed how you think about food, war, or science, share it with a friend and leave a review so more listeners can find it.
- 1 weeks ago6 min
Yasuke: Samurai, Bodyguard, or Legend?
An African man in Oda Nobunaga’s Japan became one of history’s most debated figures: Yasuke, the so-called Black samurai, bodyguard, or something in between. In this episode, we trace the real Yasuke through 16th-century Japan, Jesuit missions, and the thin historical record that turned him into legend—listen now before the myth outruns the evidence.Yasuke’s story begins with a question that still sparks debate: was he a samurai, a bodyguard, or something in between? This episode follows the African warrior who entered Oda Nobunaga’s world in 16th-century Japan, tracing the Jesuit route that brought him there, the thin historical record around him, and the legend that grew afterward.• Yasuke appears in the record only briefly, around 1579–1582, but his impact on Japanese history and global history is outsized. • Contemporary sources point to Yasuke as an attendant or bodyguard, while later retellings elevated him into a samurai legend. • The Honnō-ji Incident in 1582 is the key turning point that makes his story vanish from the archive. • Yasuke’s life opens a window into Jesuit missions, Oda Nobunaga, and early Africa-Japan contact.Chapter labels: Yasuke arrives with the Jesuits; Nobunaga notices the stranger; Samurai, bodyguard, or legend?; Honnō-ji and the missing ending; How myths grow from thin records.Related resources and links: Internal link: episode transcript; External link: Britannica’s Yasuke biography; External link: Smithsonian Magazine on Yasuke.If you enjoyed this one, share it with a friend and tell us: what do you think history remembered about Yasuke, and what did it leave out?
- 1 weeks ago3 min
Bass Reeves: The Real Lone Ranger?
What if the most famous masked lawman in American folklore had a real-life predecessor — and he was a formerly enslaved deputy U.S. marshal named Bass Reeves? In this episode, we unpack the Bass Reeves story, the 3,000-arrest legend, and the evidence behind the “real Lone Ranger” claim, so listen now before this history gets flattened into another easy myth.Bass Reeves was one of the most remarkable deputy U.S. marshals in American history, and his story may have helped shape the legend of the Lone Ranger. In this episode, we dig into Bass Reeves, the Old West, Indian Territory, and the real history behind the “3,000 arrests” claim.• Bass Reeves was born enslaved and later became a deputy U.S. marshal in Fort Smith.• He worked under Judge Isaac Parker in Indian Territory, a dangerous frontier jurisdiction.• The famous Lone Ranger comparison is intriguing, but the direct evidence is thin.• Reeves’s life adds essential context to African American history and Western history.Bass Reeves and the Old West Fort Smith and Judge Isaac Parker Indian Territory and federal law The Lone Ranger connectionRelated resources and links: • National Park Service: [Bass Reeves site bulletin](https://www.nps.gov/articles/000/bass-reeves-site-bulletin.htm) • Encyclopedia of Arkansas: [Bass Reeves](https://encyclopediaofarkansas.net/entries/bass-reeves-1747/) • Britannica: [Bass Reeves](https://www.britannica.com/biography/Bass-Reeves) • More episodes: [Our show archive](/shows) | [Black history episodes](/episodes/black-history)If this story surprised you, share it with a friend who loves true history — and subscribe for more episodes that separate myth from fact.
- 2 weeks ago4 min
Robert Smalls: The Enslaved Pilot Who Seized a Warship
An enslaved pilot in Charleston Harbor stole a Confederate warship, passed armed forts, and sailed his family to freedom in plain sight. In this episode, we follow Robert Smalls’s escape, the Civil War intelligence he delivered to the Union, and the fight for Black freedom and power that came next — listen now to hear how one night changed history.Robert Smalls was an enslaved pilot in Charleston Harbor who seized the Confederate steamer Planter, passed armed forts, and sailed his family to freedom. This episode follows the Robert Smalls escape, the Civil War intelligence he delivered to the Union, and how his courage shaped Black military service and Reconstruction politics.• Learn how Smalls used harbor knowledge, signals, and timing to pull off the escape. • Hear how the seized warship gave the Union a ship, codebook, and mine maps. • See why Robert Smalls became a symbol for Black enlistment and leadership. • Follow his postwar work in South Carolina government and the U.S. House. Chapter labels: Charleston Harbor and the Planter The Night of the Escape What the Union Got From War Hero to Lawmaker Related resources: [Transcript](/transcript), [Listen next: Reconstruction and Black political power](/episodes/reconstruction), [National Park Service biography](https://www.nps.gov/people/robert-smalls.htm), [Smithsonian Magazine feature](https://www.smithsonianmag.com/history/thrilling-tale-how-robert-smalls-heroically-sailed-stolen-confederate-ship-freedom-180963689/). If Robert Smalls surprised you, share this episode and send it to one friend who loves untold history.
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About Understand All
Welcome to Understand All, the podcast where curiosity leads and learning follows! I dive into everything from the secrets of the universe to untold stories from the past. Whether you’re a trivia buff, a history enthusiast, or just looking to spark some intellectual excitement, my episodes are crafted just for you. I aim to make every topic relatable and fascinating, perfect for anyone who loves to think and learn.Join our community of curious minds! I hope to drop new episodes twice a day to keep you curious and excited! Start and end your day with a burst of knowledge by subscribing to Understand All. Let's explore the world together—one episode at a time!
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