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December 2021
  1. The Super Awesome Exciting World of Accounting
  2. Pearl Harbor
  3. Saint Nicholas
  4. Pope Joan
  5. The Internal Combustion Engine
  6. Olympic Boondoggles
  7. Banana Republics
  8. The Vasa
November 2021
  1. Planet 9
  2. The Sistine Chapel
  3. The Mechanical Turk
  4. The Sahara Desert Wasn’t Always
  5. Black Friday
  6. The History of Thanksgiving (Encore)
  7. Who Were the Pilgrims?
  8. Pitcairn Island
  9. Everything You Wanted to Know About Seawater
  10. Vinland, Vikings, and Lactose Intolerance
  11. The Cola Wars
  12. The Culper Ring
  13. Episode 500!
  14. Inflation
  15. Operation Paperclip
  16. Gold! Gold! Gold!
  17. The Battle of Alesia (Encore)
  18. Superconductivity
  19. The Fall of Constantinople
  20. The Treaty of Versailles
  21. Shibboleths
  22. Suez Canal
  23. Tokyo Rose & Axis Sally
  24. Paradoxes
  25. Skunkworks
  26. Remember, Remember the 5th of November
  27. The Election of 1860
  28. Giving the Finger to the Denisovans
  29. Lyudmila Pavlichenko
  30. Benedict Arnold
October 2021
  1. The Real Dracula
  2. Halloween (Encore)
  3. How Casinos Work
  4. Ambergris: The World’s Most Valuable Smelly Substance
  5. Monarchies vs Republics
  6. The Louvre: The World’s Greatest Museum
  7. Wedding Traditions
  8. United States Minor Outlying Islands
  9. The 1972 Olympic Basketball Final
  10. The Great Hanoi Rat Massacre of 1902
  11. Why Does Monaco Even Exist?
  12. Navajo Code Talkers
  13. How LIGO Works
  14. El Niño and La Niña
  15. The Lost Civilization of Atlantis
  16. The Brooklyn Bridge
  17. Decimation (Encore)
  18. Moore’s Law
  19. Stanislav Petrov: The Man Who Saved the World
  20. Nostradamus
  21. USS Constitution
  22. The Dancing Plague of 1518
  23. Which Came First: Beer or Bread?
  24. Did Shakespeare Write the Works of Shakespeare? (Encore)
  25. Mountweazles (Encore)
  26. The Legend of Andre the Giant (Encore)
  27. The Canary Islands (Encore)
  28. Longitude (Encore)
  29. The Four Great Inventions of Ancient China
  30. The Korean Demilitarized Zone (DMZ)
  31. The Greatest Thing Since Sliced Bread (Encore)
September 2021
  1. Year One
  2. The Nazi Bomb
  3. Alexandria
  4. Survivor Bias
  5. The Molotov–Ribbentrop Pact
  6. Righties vs Lefties
  7. Polynesian Navigators
  8. The Great Pyramid of Giza
  9. The War of the Currents
  10. The 1961 US Figure Skating Team
  11. Alfred Wegener and Continental Drift
  12. The Truth About Pirates
  13. The Assassination of James A. Garfield
  14. Treachery of the Long Knives
  15. Cosmic Rays
  16. The Port Chicago Disaster
  17. How Göbekli Tepe Changed History
  18. Fusion Power
  19. The Island of Saint Helena
  20. The New York World Trade Center
  21. The Unlikely Survival of Phineas Gage
  22. Atomic Bombs and Two-Piece Swimsuits (Encore)
  23. The Geologic Timeline
  24. The Ride of Sybil Ludington
  25. Air Force One
  26. The Carrington Event
  27. The Fermi Paradox
  28. The Oxford English Dictionary (Encore)
  29. Behold! The Potato
  30. The Elgin Marbles
    August 2021
    1. Ignaz Semmelweis
    2. The Planet Mercury
    3. The Golden Gate Bridge
    4. The Year Without A Summer
    5. The Number of the Beast
    6. Domo Arigato Mr. Momofuku (Encore)
    7. Starfish Prime
    8. The Schlieffen Plan
    9. The Dead Sea
    10. Black Tot Day
    11. The Civic Crown
    12. Fritz Haber: The Best and Worst Chemist in History
    13. The Golden Record (Encore)
    14. The History of Credit Cards
    15. The USS Indianapolis
    16. Snake Oil
    17. History of the Lullaby
    18. The Aberfan Disaster
    19. The Great Molasses Flood (Encore)
    20. Electric Cars
    21. Salvator Mundi
    22. The Other Mozart
    23. Tokyo 2020 Olympics: Medal and Record Recap
    24. Queen Boudica
    25. The Monty Hall Problem (Encore)
    26. The 27th Amendment
    27. The American Whig Party
    28. How Do Satellites Work?
    29. The Great Lisbon Earthquake of 1755
    30. The Periodic Table of the Elements
    31. Who Was the Greatest Olympian of All Time?
    July 2021
    1. Robert Smalls: Man of Action (Encore)
    2. The Korean Axe Murder Incident
    3. Cincinnatus
    4. Were the Dark Ages Really That Dark?
    5. Timothy Dexter: Sometimes It’s Better To Be Lucky
    6. The Children of Nazis
    7. All About Uranium
    8. The Last Germans to Surrender (Encore)
    9. The Modern Olympic Games
    10. The 1972 World Chess Championship
    11. Barcodes
    12. The Miller–Urey Experiment
    13. The Erfurt Latrine Disaster (Encore)
    14. The Last Soldier to Die in World War I
    15. The Kingdom of the Netherlands
    16. The Great Emu War
    17. Infinity and Beyond
    18. The Eiffel Tower
    19. Objects of State: United States Edition
    20. The Sibylline Books
    21. Global Temperature Extremes
    22. Supernovas: They’re a Blast!
    23. Concorde: The World’s Fastest Passenger Airplane
    24. Was Jeanne Calment Really The World’s Oldest Person?
    25. Khalid Ibn al-Walid: The Sword of Allah
    26. The Hagia Sophia (Encore)
    27. What Ever Happened to Amelia Earhart?
    28. The District of Columbia
    29. 10 Ways You Can Know That the Earth is a Sphere
    30. Prester John
    31. One Year Anniversary Show
    June 2021
    1. Milankovitch Cycles (Encore)
    2. Tuvalu: The Least Visited Country in the World
    3. The History of Blue Jeans
    4. Did We Already Find Life On Mars?
    5. The Lost City of Cecil B. DeMille
    6. Absolute Zero
    7. The World’s Most Expensive Things
    8. The Assassination of President William McKinley
    9. A History of Computer Games
    10. The Voyages of Admiral Zheng He
    11. The Tunguska Event (Encore)
    12. How and What Do Astronauts Eat in Space?
    13. The World’s Greatest (Worst?) Misers
    14. The Rise and Dramatic Fall of Sejanus
    15. Gibraltar: Why Part of the UK is in the Mediterranean
    16. The History of the Microwave Oven
    17. Post-WWII German Expulsions
    18. The Drake Equation
    19. Sacco and Vanzetti
    20. The Six Political Eras In American History
    21. Apollo–Soyuz: The End of the Space Race
    22. How Clarence Birdseye Created the Frozen Food Aisle
    23. Why Don’t We All Drive On The Same Side of the Road? (Encore)
    24. Isambard Kingdom Brunel (Encore)
    25. The Incredible Polgar Sisters
    26. Beethoven’s 9th Symphony
    27. Why You Can’t Resign From the British Parliament
    28. Academic Degrees
    29. The St. Nazaire Raid
    30. Gaius Appuleius Diocles – The Richest Athlete in History
    May 2021
    1. The History of Memorial Day
    2. Why Does Liechtenstein Even Exist?
    3. The History of Mathematical Symbols
    4. The Battle of Alesia
    5. Potemkin Villages
    6. Bell Labs
    7. The 17-Year Cicada
    8. Tarrare: The Hungriest Man in History
    9. The Mercator Projection (Encore)
    10. Really Expensive Musical Instruments
    11. Scurvy
    12. The 2013 America’s Cup: The Greatest Comeback in Sport’s History
    13. Citizen Kane: The Greatest Movie Ever Made?
    14. Airport Codes
    15. Potpourri: Spain Edition
    16. The British Crown Jewels
    17. The Immortal Henrietta Lacks
    18. Examining The Zipper
    19. Randomness
    20. The Largest City in the World
    21. The South Atlantic Anomaly
    22. Juan Sebastián Elcano
    23. Mother’s Day
    24. The USS William D. Porter: The Unluckiest Ship in WWII
    25. The International Red Cross and Red Crescent
    26. EGOT
    27. The Leaning Tower of Pisa
    28. Genie the Feral Child
    29. Queen Isabella
    30. The Battle of Thermopylae
    31. May Day
    April 2021
    1. The Mount Tambora Eruption
    2. J. Harlen Bretz: Proving Theories Via Outliving Your Critics
    3. Mad Jack Churchill
    4. The Speech Richard Nixon Never Gave (Encore)
    5. Salvador Dali
    6. DEFCON
    7. Hanns Scharff: Master Interrogator of the Luftwaffe
    8. Longitude
    9. The Tallest Structures in History
    10. The Thirty Mile Zone
    11. The Halifax Explosion
    12. The World’s Oldest Restaurant
    13. Lingua Latina
    14. Who Was the 5th Beatle?
    15. The Dodo Bird
    16. Early American Alcohol Consumption
    17. Elizabeth Swaney and the Power of Just Showing Up
    18. Ancient Colors
    19. Non-Spanish Languages of Spain
    20. Charles Boycott
    21. Wrestlemania
    22. The Assassination of James A. Garfield
    23. Why Does Vatican City Exist?
    24. Polynesian Navigators
    25. The United State’s Name
    26. Al Andalus
    27. The Podcast About Podcasts
    28. The Incomparable Hedy Lamarr
    29. Why Did Hitler Declare War on the United States?
    30. April Fool’s Day
    March 2021
    1. Mount Athos
    2. The History of the English Language
    3. Spanish Africa
    4. The Red Ball Express
    5. Fantasy Nobel Prizes: Isaac Newton
    6. The 7 People Who Control the Internet
    7. The Problem With Track & Field World Records
    8. Did Shakespeare Write the Works of Shakespeare?
    9. Rome: Republic vs Empire
    10. La Liga
    11. The Svalbard Global Seed Vault
    12. Understanding Orchestras
    13. The B-52 Stratofortress
    14. The Yellow Fleet
    15. St. Patrick’s Day
    16. Unratified Amendments
    17. El Gordo
    18. Daylight Savings Time
    19. How the US Civil War Really Ended
    20. How Australia Won Its First Winter Olympic Gold Medal
    21. Why Does San Marino Even Exist?
    22. A History of Vaccines
    23. The Isabella Stewart Gardner Museum Heist
    24. The Mercury 13
    25. The Iditarod
    26. Operation Sea Lion
    27. Darwin’s Other Theory
    28. President for a Day
    29. The Deep Biosphere
    30. Zeppelins
    31. The War of Jenkins Ear
    February 2021
    1. The Princes in the Tower
    2. The Zimmerman Telegram
    3. Cathedrals
    4. Mountweazles
    5. A History of Mars Exploration
    6. The London Beer Flood
    7. Units of Measure
    8. Mitochondrial Eve
    9. The Elevator
    10. Space Junk
    11. Who Was the Richest Person in History? (Encore)
    12. Why are French Fries called French Fries? (Encore)
    13. Why Doesn’t the US Use The Metric System? (Encore)
    14. Decimation
    15. The Theremin
    16. Valentines Day
    17. Domus Aurea
    18. The SS Politician
    19. Hammurabi’s Code
    20. The Monty Hall Problem
    21. The Legend of Andre the Giant
    22. Jack the Ripper
    23. The Super Bowl
    24. AM/FM
    25. Tulipmania
    26. The Smallest Country in the World
    27. The 1937 Soviet Census
    28. Extraterritoriality

    January 2021
    1. The Dionne Quintuplets
    2. Operation Plumbbob
    3. QWERTY
    4. The Green Bay Packers
    5. Cosmos 954
    6. Milankovitch Cycles
    7. Project MKUltra
    8. The Year of the Five Emperors
    9. The Year of the Four Emperors
    10. The Oxford English Dictionary
    11. Exclaves and Enclaves
    12. Inauguration Day
    13. The Crash at Crush
    14. ALL RATS MUST DIE!!!
    15. The British Pound(s)
    16. Moving Day in New York
    17. Did Gutenburg Really Invent the Printing Press?
    18. The Dunbar Number
    19. D.B. Cooper
    20. Surströmming
    21. Hispania
    22. The Nuclear Football
    23. The McRib
    24. The Erfurt Latrine Disaster
    25. The Golden Record
    26. The Last Germans to Surrender
    27. The 12 Days of Christmas
    28. The Canary Islands
    29. Reginaldus
    30. The SS Warrimoo
    31. Why Does The New Year Start on January 1?
    December 2020
    1. Nijmegen: The City That Remembers (Encore)
    2. The Election of 1824 (Encore)
    3. The Most Famous Song in the World (Encore)
    4. Kayfabe (Encore)
    5. The Six Star General (Encore)
    6. Atlantropa: The Most Ridiculous Idea Ever (Encore)
    7. The Last Crow War Chief (Encore)
    8. The Most Dominant Athlete Ever (Encore)
    9. The Empire that Never Existed (Encore)
    10. Why Do We Celebrate Christmas on December 25?
    11. Catalonian Christmas Traditions
    12. Why Don’t We All Drive on the Same Side?
    13. What’s the Deal With Dark Matter?
    14. The Speech Richard Nixon Never Gave
    15. The Rosetta Stone
    16. Atomic Bombs and Two-Piece Swimsuits
    17. All About ZIP Codes
    18. The World’s Oldest Democratic Body
    19. The Terrible Fate of Blanche Monnier
    20. Aluminum
    21. Radiometric Dating
    22. The Man Who Didn’t Want to be Pope
    23. Roman Concrete
    24. The Mercator Projection
    25. Picasso
    26. The Real Illuminati
    27. The Voynich Manuscript
    28. How Many Nobel Prizes Should Einstein Have Won?
    29. Syndrome K
    30. Martha Mitchell Was Right
    31. Radiation 101
    November 2020
    1. Spanish Foods
    2. Battle of Cannae
    3. The House of David
    4. Operation Tannenbaum
    5. Get the Lead Out
    6. George Eyser
    7. The History of Thanksgiving
    8. The Holy Grail
    9. America’s First Law
    10. The World’s Largest Co-Principality
    11. Operation London Bridge
    12. UNESCO World Heritage Sites
    13. The Pintupi Nine
    14. The Election of 1800
    15. Spanish Festivals
    16. Jury Duty
    17. The Longest Games in History
    18. The Sultana Steamboat Disaster
    19. Blues vs Greens
    20. The Assassination of Arch Duke Franz Ferdinand
    21. Really Big Telescopes
    22. The Sagrada Familia
    23. Ramanujan
    24. A History of Bread
    25. The Pig War
    26. What Exactly Happens After Election Day?
    27. Extremely Close Elections
    28. Who Was the Richest Person in History?
    29. The Camino de Santiago
    30. The Great Molasses Flood
    October 2020
    1. Halloween
    2. Last Man on the Moon
    3. The History of Antarctica
    4. Domo Arigato Mr. Momofuku
    5. The World’s Deepest Hole
    6. The Continents
    7. Outlawry
    8. Tsar Bomba
    9. Extremely Long Term Debt
    10. The History of Presidential Debates
    11. Pyrrhic Victory
    12. The Election of 1876
    13. The Purchase of Alaska
    14. Operation Mincemeat
    15. The Curious Case of Kaspar Hauser
    16. The History of Ketchup
    17. Number One at Being Number Two
    18. Episode 100
    19. The Earth’s Most Extreme Places
    20. The SR-71 Blackbird
    21. Take the Penny, Leave the Penny
    22. That Time the CIA Kidnapped a Soviet Lunar Lander
    23. The Fabian Strategy
    24. Containerization
    25. Who is the Current Roman Emperor?
    26. Cold Fusion
    27. Wrestling’s GOAT: Aleksandr Karelin
    28. Károly Takács: Ambidextrous Gold Medalist
    29. The Eradication of Smallpox
    30. The Tunguska Event
    31. The Hagia Sophia

    September 2020
    1. The Electoral College
    2. Robert Smalls: Man of Action
    3. US Territories
    4. Greek Fire
    5. Isambard Kingdom Brunel
    6. Point Nemo
    7. Potpourri Vol II: The Frozen Four
    8. The Global Positioning System
    9. All Roads Lead to Rome
    10. The Lykov Family
    11. Nijmegen: The City That Remembers
    12. The Discovery of Fire
    13. No Show
    14. No Show
    15. No Show
    16. No Show
    17. No Show
    18. No Show
    19. Potpourri Volume I: Survival
    20. A Fist Full of Dollars
    21. Who Discovered Calculus?
    22. Fallacious Reasoning
    23. The Fosbury Flop
    24. An Incredibly Bright Idea
    25. The Two-Hour Marathon
    26. The First Transatlantic Cable
    27. The Election of 1824
    28. The Seven Wonders of the Ancient World
    29. That New Pope Smell
    30. The World’s Oldest Satellite
    August 2020
    1. A Brief History of Timekeeping
    2. The First Pandemic
    3. Eponymous Laws
    4. Football, Soccer, and Rugby
    5. The Latin Alphabet
    6. Why are French Fries called French Fries?
    7. The Last US Civil War Pension
    8. The Most Famous Song in the World
    9. The US/Canadian Border
    10. The English Longbow
    11. The Man Who Fed the World
    12. Why Doesn’t the US Use the Metric System?
    13. Cursus Honorum
    14. European vs North American Sports
    15. Lis Hartel: A Remarkable Olympian
    16. The United Countries of America
    17. Church of the Holy Sepulchre
    18. The Real Life Dexter
    19. Damnatio Memoriae
    20. The Washington Generals
    21. Kayfabe
    22. Drug Lord Hippopotamuses
    23. Grandmother of Europe
    24. Boxing’s Alphabet Soup
    25. Lunar Orbit Rendezvous
    26. The Original Dow Jones Companies
    27. Lloyd Burke: American Badass
    28. The Great Peshtigo Fire
    29. Imperial Leftovers
    30. Van Halen and M&Ms
    31. The Pitch Drop Experiment

    July 2020
    1. Beamonesque
    2. The French Scrabble Champion
    3. The Interstate Highway System
    4. How Many Planets Are There?
    5. The Prime Minister Who Disappeared
    6. The Julian and Gregorian Calendars
    7. Atlantropa: The Most Ridiculous Idea Ever
    8. When did Canada REALLY become independent?
    9. Neil Armstrong’s First Time in Space
    10. Blowouts
    11. The British Line of Succession
    12. The Six Star General
    13. The 1960 Popular Vote
    14. Jesse Owens vs Usain Bolt: Who Would Win?
    15. Zero, My Hero
    16. The Army That Never Was
    17. Time Zone Oddities
    18. Rutherford B. Hayes is a Big Deal in Paraguay
    19. The Last Crow War Chief
    20. Disco Demolition Night
    21. The Greatest Simplest Idea in the World
    22. Stealing the Mona Lisa
    23. Ancient Rome and Ancient China
    24. The Greatest Thing Since Sliced Bread
    25. How Many Countries Are There?
    26. Broccoli, James Broccoli
    27. The 1904 Olympic Marathon
    28. The REAL Independence Day
    29. The Most Dominant Athlete Ever
    30. President Tyler’s Grandsons
    31. The Empire that Never Existed