
99% Invisible
99% Invisible is a weekly exploration of the process and power of design and architecture. Hosted by Roman Mars, the podcast uncovers the hidden stories behind the objects, buildings, and systems that shape our world. From award-winning producer Roman Mars, it reveals how design influences our daily lives in ways we often overlook.
Episodes
100 Objects #7: The Otis Pamphlet
Before the Declaration of Independence was even a twinkle in the founding fathers' eyes, there was James Otis. Journalist Jack Hitt returns to tell the wild, tragic story of America’s forgotten proto-founding father and his inflammatory 1764 pamphlet. A story that is, in many ways, the story of the founding document of the United States of America.
A History of the United States in 100 Objects is
Transatlantic Fiber-Optic Expialidocious
Before the internet went global, one undersea gamble made it possible.
Jane Ruffino’s story, "Say Goodbye to the Undersea Cable That Made the Global Internet Possible," appears in the May-June issue of Wired magazine.
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100 Objects #6: "Sharpened Screwdriver"
In this episode, Roman and historians Heather Ann Thompson and Elliot Williams tell the story of the sharpened screwdriver: the object at the heart of the 1984 Bernhard Goetz subway shooting. In a difficult moment in New York City, four Black teenagers were transformed in the public imagination into armed criminals. What follows is a gripping account of how misinformation takes hold, how fear shap
The Most Exciting Change America Has Ever Seen
Billions of state quarters disappeared from circulation...and that was exactly the plan.
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100 Objects #5: Blue Back Speller
In this episode, Roman and historian Imani Perry follow the Webster Blue Back Speller from the early days of the United States, to the heart of Black intellectual life. Through the lives of Booker T. Washington and W. E. B. Du Bois, Roman and Imani uncover how a single object became a gateway to literacy, self-determination, and an enduring debate about what education, citizenship, and freedom sho
The Horn That Divided the World Cup
Love it or hate it, one buzzing horn changed the sound of the World Cup forever.
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100 Objects #4: Lowe's Gas Bag
In 1861, one man and a “gas bag” filled with hydrogen sparked America's obsession with going higher, farther, into the unknown. In this episode, Roman and journalist Jack Hitt tell the story of Thaddeus Lowe — showman, scientist, and dreamer — whose balloon flight from Cincinnati went wildly off course and straight into the Civil War. Lowe pivoted to create the US military's first aerial reconnais
Karaoke Videos
Behind every cheesy karaoke track was a surprisingly ambitious filmmaking experiment.
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100 Objects #3: The Pension Files
What do Civil War pension files reveal about one of history's most successful slave rebellions? Historian Edda Fields-Black joins Roman to trace a story of fire, flight, and freedom — beginning on a South Carolina rice plantation in 1863, where a Union raid liberated over 700 people in a single night. By unearthing Black soldiers' testimonies buried in military pension applications, they resurrect
The MAPL Test
Canada reshaped its music industry with a quirky radio rule that changed who got heard.
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100 Objects #2: 60-Degree Screw
In the early 20th century, nothing quite fit — fire hoses couldn't connect to one another, football teams played with different balls, traffic lights meant different things in different states. Then World War II exposed the deadly cost of incompatibility, and the US quietly imposed a single solution on production lines across the world: the 60-degree screw. Roman Mars and historian Daniel Immerwah
Drug Story: Ivermectin
What started as a revolutionary treatment for river blindness became something far messier.
Listen to Drug Story wherever you get your podcasts!
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100 Objects #1: The Century Safe
In 1876, Americans filled an iron safe with objects meant to tell their story — to be opened a century later. Roman Mars and historian Jill Lepore trace its long wait, from Reconstruction to Watergate, and the surprising, unsettling contents that emerged in 1976. What do the objects we choose to preserve — or forget — reveal about how we author our own history?
A History of the United States in 10
Ask Your Doctor About
As wild and random as they might seem, a lot of work—and even poetry—goes into coming up with today's catchiest, most unforgettable drug names.
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A History of the United States in 100 Objects Trailer
America’s 250th birthday calls for a history as sprawling and contradictory as the country itself.
A History of the United States in 100 Objects — hosted by Roman Mars and produced by BBC Studios and 99% Invisible — tells that history one thing at a time. A gold coin from an 1857 shipwreck that triggered a financial panic. An antebellum schoolbook that became an instrument of Black liberation. A
Enshittification
Why is it suddenly so hard to fix the stuff we depend on most?
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Citizen of the World
One man rejected nationality and dared the world to recognize him anyway.
Listen to Far From Home wherever you get your podcasts.
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Constitution Breakdown #9: Alondra Nelson
This is the ninth episode of our ongoing series breaking down the U.S. Constitution.
This month, Roman and Elizabeth discuss Article VI and VII, which include some odds and ends like the Debts Clause, the No Religious Test Clause, and the process for ratification. But tucked into Article VI is the all-important Supremacy Clause, which states that the Constitution is the “supreme Law of the Land,”
Co-op City
The world’s largest housing co-op—built to save New York City’s middle class—became the unlikely site of a resident revolt
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RoboUmp Hits the Big Leagues
One study from 2018 found that Major League Baseball umpires blow about 14 calls every game. That’s 34,000 bad calls every year. And it makes a difference. A blown strike call can decide a win or a loss, a championship or six months at home, wondering what could have been. And while umpires are about 97% accurate in calling balls and strikes, Major League Baseball has been considering something dr
Service Request #5: Dude, Where's My Car?
A missing car reveals the confusing rules, murky fees, and private actors behind modern towing.
What infrastructure mystery keeps you up at night? Submit your Service Request by recording a voice memo with your question and emailing it to servicerequest@99pi.org.
Service Request is a production of 99% Invisible and Campside Media.
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Service Request #4: How Does the Grid in Phoenix Work?
In a place where losing power can turn deadly, keeping the lights on is a high-stakes balancing act.
What infrastructure mystery keeps you up at night? Submit your Service Request by recording a voice memo with your question and emailing it to servicerequest@99pi.org.
Service Request is a production of 99% Invisible and Campside Media.
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Service Request #3: Why Is There So Much Litter in San Francisco?
Why did it take nearly a decade to redesign a city trash can, and why haven't more bins made the streets cleaner?
What infrastructure mystery keeps you up at night? Submit your Service Request by recording a voice memo with your question and emailing it to servicerequest@99pi.org.
Service Request is a production of 99% Invisible and Campside Media.
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Constitution Breakdown #8: Jill Lepore
This is the eighth episode of our ongoing series breaking down the U.S. Constitution.
This month, Roman and Elizabeth discuss Article V, which lays out the process to amend the Constitution.
Then, Jill Lepore lays out her thesis that the Constitution is truly meant to be amended, explains why Article V amendments have become functionally impossible, and tells some fascinating stories about the peo
Service Request #2: Why Is This Red Light So Damn Long?
What the world's most advanced traffic system can—and can't—do for the city that invented gridlock.
What infrastructure mystery keeps you up at night? Submit your Service Request by recording a voice memo with your question and emailing it to servicerequest@99pi.org.
Service Request is a production of 99% Invisible and Campside Media.
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Service Request #1: What Happens When I Call 311?
The surprising power of a simple phone number to connect a community.
What infrastructure mystery keeps you up at night? Submit your Service Request by recording a voice memo with your question and emailing it to servicerequest@99pi.org.
Service Request is a production of 99% Invisible and Campside Media.
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A Man, a Plan, a Canal—Mars!
How one wealthy, amateur astronomer convinced the world Martians were real.
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Where the F*** Are We?
For centuries, the world's greatest minds were stumped by the deadly mystery of longitude, until an obsessive underdog entered the fray and changed navigation forever.
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Constitution Breakdown #7: California AG Rob Bonta
This is the seventh episode of our ongoing series breaking down the U.S. Constitution.
This month, Roman and Elizabeth discuss Article IV, which outlines the relationship between states and between states and the federal government. They add the 10th Amendment to the conversation, because that also talks about the states.
Then, California Attorney General Rob Bonta joins to talk about how his offi
The Longest Fence in the World
How a fence meant to protect sheep transformed the entire Australian landscape.
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Molar City
How a small Mexican border town transformed itself into the dental tourism capital of the world, where dental care costs up to 80% less than what it might cost in the United States.
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Artistic License Redux
Idaho was the first state to slap a slogan on a license plate, “Idaho Potatoes,” which may not seem like a big deal, but it turns out this idea would end up having outsized consequences, and not just for Idaho. Because what started in one state would soon spread. And when it did, the question of what should go on a license plate, and what shouldn't, would prove surprisingly contentious.
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The Em Dash
The strange history of a punctuation mark that makes writing feel human, and why people now think it proves the opposite.
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Constitution Breakdown #6: Adam Liptak
This is the sixth episode of our ongoing series breaking down the U.S. Constitution.This month, Roman and Elizabeth discuss Article III, which establishes the judicial branch, alongside New York Times chief legal affairs correspondent, Adam Liptak.
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What’s in a Name
Throughout Africa and beyond, Zimbabweans are known for choosing some of the most bold, head-turning English-language names. Zimbabwean producer Kim Chakanetsa tells the story of how her country's journey from colonial rule to independence shaped the nation's unique naming traditions.
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Audio Flux
This week we're featuring Audio Flux, a short-form audio challenge where artists squeeze surprising stories into three minutes.Find out more about Audio Flux by visiting audioflux.orgFollow Audio Flux on Instagram: @audiofluxingFeatured Audio Flux stories include:The Sound of Silence by Gregory Warner and Sana KrasikovIn Between Silence by Talia AugustidisThe Ghost on Side B by Katelyn Hale Wood w
Exit Interview With Michael Bierut
A young designer faces an impossible brief and discovers the spark that will define his legendary career.
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Mini-Stories: Volume 22
Performance changing gear, a Titanic era nurse with unbelievable resilience, and an ingenious art vending project reveal how innovation and endurance shape unexpected worlds.
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Beyond the 99% Invisible City
From rogue stop signs to rooftop mini golf, discover how chaos and creativity quietly shape the urban world.
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Constitution Breakdown #5: Dr. Tom Frieden
This is the fifth episode of our ongoing series breaking down the U.S. Constitution.This month, Roman and Elizabeth turn to the rest of Article Two with former CDC director Dr. Tom Frieden, talking about the experience of being a highly trained expert in an inherently political institution within the executive branch. Dr. Frieden was also the New York City Public Health Commissioner under Mayor Bl
Mini-Stories: Volume 21
A glowing Vegas pyramid, a famously mistyped domain, and a long-delayed miracle investigation unfold in three unexpected tales.
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Sax Appeal
From military parades to smoky clubs, one invention’s wild journey reveals how an instrument can become a symbol of rebellion and reinvention.
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The Checkerboard
A single diagonal step on a map sparks a legal war with huge consequences.
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U Is for Urbanism
How Jane Jacob's urbanism dreams came to life on the most beloved kids' TV block.
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Constitution Breakdown #4: Janet Napolitano
This is the fourth episode of our ongoing series breaking down the U.S. Constitution.This month, Roman and Elizabeth turn to Article Two, which establishes the executive branch, alongside former Secretary of Homeland Security Janet Napolitano. Elizabeth also explains why Trump administration’s attacks on Venezuelan boats defy even the broadest interpretation of the president's war powers.
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Murderland
Writer Caroline Fraser argues a chilling link between industrial poison, deadly design, and a generation of serial killers in the Pacific Northwest.
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The Moving Walkway Is Ending
People once dreamed of sidewalks that could whisk them across cities. Somehow, that dream ended up at the airport.
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How to Write a Joke
Comedy writer Elliott Kalan (The Daily Show, The Flop House, Mystery Science Theater 3000, and co-host of the 99% Invisible Breakdown of The Power Broker) spills the secrets of how he grows jokes from tiny ideas into full-blown laughs.Joke Farming: How to Write Comedy and Other Nonsense is out on Nov 12. Find it in your favorite bookstore.
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Gear (Articles of Interest)
From buckskin breeches to Patagonia vests, uncover how America’s obsession with ruggedness and war shaped the clothes we wear every day. Avery Trufelman is back with an episode from Articles of Interest's latest season.
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Constitution Breakdown #3: Sen. Elizabeth Warren
This is the third episode of our ongoing series breaking down the U.S. Constitution.This month, Roman and Elizabeth dive into Article One, Sections 8 through 10, which spells out what Congress can and cannot do. They unpack everything from the Commerce Clause to the taxing and spending powers, the Necessary and Proper Clause, and even a few long-forgotten quirks like letters of marque and reprisal
Your Call Is Important to Us
What if all those dropped calls, endless wait times and dead end hotlines every time you try to reach customer service weren’t accidents but part of the plan?
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Hidden Levels #6: Segagaga
One SEGA employee chronicles the company’s struggles the only way he knows how: by turning it into a game.Hidden Levels is a production of 99% Invisible and WBUR's Endless Thread.
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Hidden Levels #5: Press B to Touch Grass
From blocky biomes to breathtaking open worlds, video games are teaching us new ways to see, build, and even save nature.Hidden Levels is a production of 99% Invisible and WBUR's Endless Thread.
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Hidden Levels #4: Machinima
Back in the 90s, artists turned video games into movie sets, and their wildest ideas are finally hitting documentaries.Hidden Levels is a production of 99% Invisible and WBUR's Endless Thread.
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Hidden Levels #3: This Game Wants YOU
Before Fortnite and Call of Duty ruled the scene, the US Army quietly shaped the early 2000s with a wildly popular, free shooter designed to excite young people about enlisting.Hidden Levels is a production of 99% Invisible and WBUR's Endless Thread.
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Hidden Levels #2: Stick It to 'Em
From airplanes to Pac-Man to the battlefield, the joystick has quietly shaped the way humans connect with machines.Hidden Levels is a production of 99% Invisible and WBUR's Endless Thread.
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Hidden Levels #1: Mr. Boomshakalaka
Step back into the ’90s, when dunks broke backboards, catchphrases caught fire, and one arcade game turned every kid into an NBA superstar.Hidden Levels is a production of 99% Invisible and WBUR's Endless Thread.
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Get Played with Roman Mars and Ben Brock Johnson
In anticipation of the release of Hidden Levels, Roman and Ben join Heather Anne Campbell (Rick and Morty) and Matt Apodaca of Get Played to talk controllers, culture, and why video games might just be running the world.Hidden Levels launches on October 7th wherever you get your podcasts. Join SiriusXM Podcasts+ to listen to each episode early and ad-free.
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The Power Broker #13: Drop Dead City
Like a shadow epilogue to The Power Broker, this story plunges into the chaos of 1970s New York where debt, unions, and one brutal headline nearly broke the city.Drop Dead City is now playing in select cities, and available on VOD on November 14. You can watch the trailer here.The Power Broker #13: Drop Dead City
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Constitution Breakdown #2: Rep. Sharice Davids
This is the second episode of our ongoing series breaking down the U.S. Constitution.This month, Roman and Elizabeth dive into Article One with Representative Sharice Davids, examining lawmaking, committees, and the unique responsibilities of the House of Representatives.Elizabeth also explains how the Supreme Court’s “major questions doctrine" could decide whether Trump’s sweeping use of tariffs
The New Jungle
In a Colorado meatpacking town, refugees fleeing persecution find themselves in some of the most dangerous jobs in America.This episode was produced in partnership with the Food & Environment Reporting Network, an independent, nonprofit news organization.The New Jungle
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Replaceable You
Mary Roach dives into the strange, funny, and unsettling world of designing new body parts, from pig hearts to prosthetic feet, revealing just how messy replacing ourselves can be.Replaceable You
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Revisiting The 99% Invisible City
We’re excited to celebrate the 5th anniversary of The 99% Invisible City, a NYT Bestseller by Roman Mars and Kurt Kohlstedt, with a guided audio tour of beautiful downtown Oakland, California. Join us as we explore different everyday designs, using examples from the built environment around our old offices as jumping-off points.And if you don't already have one: be sure to get your print or audio
The 99PI Anniversary Special: 15 for 15
For 99PI’s 15th anniversary, Roman sits in the hot seat to answer 15 eclectic questions, touching on everything from his dream merch to the one object he's always wanted to cover on the show.Plus, a behind-the-scenes look at how the show gets made.The 99PI Anniversary Special: 15 for 15
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Ambassador Bridge
A billionaire family’s private bridge empire shaped Detroit for decades, sparking battles over power, neighborhoods, and the future of an international crossing.Ambassador Bridge
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All About That Bass
Vintage music barely had any bass. Today’s hits are all about the low end. What changed? An episode this week from our friends at Twenty Thousand Hertz, featuring hip hop legend DJ Jazzy Jeff and Roland's Paul McCabe.All About That Bass
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Sister Aimee and the Birth of the Megachurch
Aimee Semple McPherson built America’s first megachurch, blended showbiz with salvation, and vanished in a scandal that captivated the nation.Sister Aimee and the Birth of the Megachurch
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Weeding is Fundamental Revisited
Libraries get rid of books all the time. There are so many new books coming in every day and only a finite amount of library space. The practice of freeing up library space is called weeding. When the main branch of the San Francisco Public Library was damaged by an earthquake 1989, the argument over which books need to be weeded, and how they were chosen for removal, reached fever pitch.This epis
Air-Borne
Old ideas about air and disease were wrong on the science, but looking to the past might actually help us design healthier buildings today.Air-Borne
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Constitution Breakdown #1: Nikole Hannah-Jones
This is the first official episode of our ongoing series breaking down the U.S. Constitution.This month, Roman and Elizabeth discuss the Preamble, alongside Nikole Hannah-Jones. Elizabeth also explains that while the United States generally does not allow a standing army to be used against civilians, Trump has been exploiting an exception to keep troops in Los Angeles to protect ICE agents — with
The Quiet Storm
How a radio show born at a small college station in DC and dedicated to smooth, romantic love songs transformed black radio and reshaped love lives across the country.The Quiet Storm
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Neil Young’s iPod Killer
A rock icon sets out to save music with a strange yellow gadget that almost no one understood.Neil Young’s iPod KillerIf you're new to the show (thanks Apple Podcasts!) here are some favorite episodes to get you started:Freedom House Ambulance ServiceOne-Nil to the ArsenalGuerrilla Public Service ReduxTowers of SilenceThe House that Came in the MailThe Real Book
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Roman Mars's Guide to San Francisco
In this bonus episode, an offbeat walking tour through San Francisco uncovers hidden rooftop parks, a leaning skyscraper scandal, a vanished statue, and the graceful brilliance of the Golden Gate Bridge.This episode is sponsored by GetYourGuide. Discover and book experiences for your next trip at getyourguide.com.Roman Mars's Guide to San Francisco
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Food Deserts
How did millions of Americans end up living in neighborhoods where finding fresh food is harder than ever, and why is the problem by design, not accident? The answer rests in a major policy shift that fundamentally altered the American food landscape.Food DesertsIf you're new to the show (thanks Apple Podcasts!) here are some favorite episodes to get you started:Freedom House Ambulance ServiceOne-
Open Borders
An immigration reporter’s chance encounter in the desert reveals how borders shape our actions, our beliefs, and the way we see the world around us.Open BordersIf you're new to the show (thanks Apple Podcasts!) here are some favorite episodes to get you started:Freedom House Ambulance ServiceOne-Nil to the ArsenalGuerrilla Public Service ReduxTowers of SilenceThe House that Came in the MailThe Rea
The Titanic's Best Lifeboat
A century-old shipwreck, a sea of glass, and the lifeboats that were never meant to save you.The Titanic Was The Lifeboat
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The Red, the Black, and the Green
After Minneapolis police officer Derek Chauvin murdered George Floyd last year, tens of thousands of people all over the world took to the streets to protest police violence against Black people. And if you look at images from these marches, you will probably start to notice a common color scheme -- one involving a lot of red, black, and green. The flag was invented to unite Black people all over
The Return of Con Law
We heard you. The chorus of voices asking “where is Con Law? Where is Professor Elizabeth Joh to guide us through this madness? We need it now more than ever!” Well, here it is. We’re back with a special extra-long episode about Trump’s perverted use of the Alien Enemies Act to deport people without due process and how judges are trying to hold the administration accountable to the Constitution.Pl
Adapt or Design
A debilitating injury forces 99PI's Kurt Kohlstedt to confront new everyday challenges and seek out accessible design solutions for one-handed living.The full set of Adapt or Design articles can be found at 99pi.org/adapt.Adapt or Design
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Build, Interrupted: A Conversation with Ezra Klein
Why is it so hard to build anything in America? Ezra Klein explores how our good intentions led to a system that stifles progress, and what it would take to break free.Abundance by Ezra Klein and Derek ThompsonBuild, Interrupted: A Conversation with Ezra Klein
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