In which Syrian ascetics and American steeplejacks alike enjoy the weirdest fad of all time, and Ken angers marathon runners. Certificate #45561.

In which a fifth-grader from Maine becomes a diplomatic sensation after writing a nervous letter to Moscow, and John remembers the only fan letter he ever wrote. Certificate #35519.

In which we learn that one very specific region of West Africa produces more twins than anywhere else on earth, which could be due to heredity, yams, or, in Ken's mind, a mysterious glowing meteorite. Certificate #29437.

In which the dreams of the French Revolution are finally fulfilled by modern physicists eager to re-define science itself from scratch, which probably triggered the alien landing in May 2019. Certificate #37545.

In which a gas crisis and an early social media network conspire to make long-haul truck drivers national heroes, and Ken gives a big 10-4 to a heroic trucker named "Fuzzy." Certificate #25007.

In which we read the Victorian novel that, a century later, would start an avalanche of body-swapping movie comedies, and John tries to debunk the blind prophet Tiresias. Certificate #30972.

In which we follow up on the forty-two offspring of the "grandmother of Europe," including the one who led Germany into World War I and the one who might have been Jack the Ripper. Certificate #26374.

In which a revenge-crazed football coach runs up a 222-0 score against a squad of random law students and townies, and John explains why his go-to comedy move is dropping his pants. Certificate #26347.

In which Franklin Roosevelt builds a secret, private train station under the Waldorf-Astoria Hotel, and John almost defects to East Germany in a gaily colored ski jacket. Certificate #33725.

In which a Vermont farmer unveils to the world a natural beauty of crystalline perfection that's been hiding in plain sight, and Ken and John decide to slander Buzz Aldrin for some reason. Certificate #16919.

In which we study the spurving bearings and hydrocoptic marzlevanes of the made-up machine that brought technobabble to the masses, and John actually encourages Ken to talk about Star Trek for a change. Certificate #45305.

In which one Gilded Age influencer puts Santa at the North Pole because he hates slavery so much and runs New York's most powerful man out of town on a rail because he hates the Irish so much. Certificate #33423.

In which peace and holiday good will break out on the western front in 1914, partly due to the work of suffragettes, and it changes the tourism industry forever. Also, Ken defends fruitcake. Certificate #31405.

In which we explore one of the weirdest funeral superstitions of pagan Europe, and John explains why he likes to retell Aesop's Fables from the bad guys' point of view. Certificate #44411.

In which one artist redefines eroticism for the MTV generation, and John gets stuck with a very overpriced piece of Duran Duran memorabilia. Certificate #31513.

In which a South Carolina slave seizes a heavily armed Confederate ship and sails it to freedom and instant celebrity, whereas Ken doesn't even own a hatchet. Certificate #38760.

In which a hard-to-kill Asian insect arrives in America and discovers a delightful new predator-free life eating our produce, hiding behind our picture frames, and making everything smell like cilantro-infused sewage. Certificate #30979.

In which Ken accidentally goes on vacation to a long submerged, 2,000-year-old forest, and John explains the value he can add to a rugby game or campfire. Certificate #1751.

In which 1970s and 1980s TV is overrun by an avalanche of orphans, runaways, and other wisecracking moppets, and John reveals that Oscar the Grouch is a witch in a "fursuit." Certificate #37500.

In which the Islamic practice of facing Mecca in prayer becomes a thorny theological and geographical question, particularly for Muslims in Alaska, French Polynesia, or low-earth orbit. Certificate #2405.

In which we consider America's favorite gourd as a botanical mystery, a symbol of autumn, a Civil War flashpoint, an Illinois monoculture, a delivery vehicle for condensed milk, and an instrument of Starbucks-related misogyny and class warfare. Certificate #36525.

In which the Cajun cooking fad of the 1980s spawns a hazardous new holiday favorite, and Ken's wife flips us the bird. Certificate #30269.

In which a tiny French minority in the Pyrenees is shunned and hated for reasons no one can quite remember, and John pronounces the words "goose foot" more capably than Ken. Certificate #28287.

In which the notorious "Miser of Acton" forgets to sign his will, and for over a century thousands of people--including Ken's family--become convinced they are rightful heirs to his $300 million fortune. Certificate #23502.

In which a troubled street performer becomes a beloved musician and helps found a landmark record label, Ken buys a booby-trapped painting, and John critiques the storytelling of celebrity children. Certificate #49895.