After World War I, in Frankfurt, Germany, the city government was taking on a big project. A lot of residents were in dire straits, and in the second half of the 1920s, the city built over 10,000 public housing units. It was some of the earliest modern architecture — simple, clean, and uniform. The massive housing effort was, in many ways, eye-poppingly impressive, with all new construction and sleek, cutting edge architecture. But one room in these new housing units was far and away the most lauded and influential: and that was the kitchen. Many consider the Frankfurt Kitchen to be nothing less than the first modern kitchen. A few of these kitchens still exist, some in museums. And it's strange to see one there, because to modern eyes, it doesn’t appear to be high art. It just looks like a kitchen. The Frankfurt Kitchen Subscribe to SiriusXM Podcasts+ to listen to new episodes of 99% Invisible ad-free and a whole week early. Start a free trial now on Apple Podcasts or by visiting siriusxm.com/podcastsplus. Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.

Amid the noisy bustle of Mexico City, there is a particularly iconic sound echoing on repeat in the background. This recording blares from trucks that cruise the streets all across this massive city. The crews inside are looking to buy old household items and appliances to fix and resell or to just sell for scrap. Basically, they’re scrap metal haulers, and the recording is their pitch to prospective sellers. Their pitch culminates in "o algo de fierro viejo que vendan," which basically means “or any old metal thing you’re selling.” This last bit has become the recording’s namesake: fierro viejo, literally “old iron.” How this recording (and its subsequent remixes for live performances and otherwise) managed to achieve icon status in Mexico is a story of an unlikely alchemy: a family that, through grit, talent and a bit of luck, transmuted scrap metal into poetry, music, and joy. The Siren of Scrap Metal Subscribe to SiriusXM Podcasts+ to listen to new episodes of 99% Invisible ad-free and a whole week early. Start a free trial now on Apple Podcasts or by visiting siriusxm.com/podcastsplus. Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.

As electronic news gathering was gaining prominence in the early 20th century, the American Bar Association began to fear its effect on court trials and adopted something called Canon 35. This condemned the use of photography, motion picture, and radio recording within the confines of the courtroom. It wasn't a law, per se, but a code of ethics that cautioned against recording technology in the trial process. Many state and federal courts followed suit...making way for illustrators. Cameras began to creep their way back into courtrooms over the decades, but courtroom artists are still constantly used in high profile cases. Courtroom Sketch Subscribe to SiriusXM Podcasts+ to listen to new episodes of 99% Invisible ad-free and a whole week early. Start a free trial now on Apple Podcasts or by visiting siriusxm.com/podcastsplus. Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.

The unlikely battle between the creator of the New York Public Library children's reading room and the beloved children’s classic Goodnight Moon. Goodnight Nobody Subscribe to SiriusXM Podcasts+ to listen to new episodes of 99% Invisible ad-free and a whole week early. Start a free trial now on Apple Podcasts or by visiting siriusxm.com/podcastsplus. Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.

Happy National Train Day, everyone – for those of you who missed it: that was May 13th this year. A year ago, we started down this path with Train Set: Track One, which gave way to Track Two …and now, here we are for the final part of our train-fecta. Slip coaches, the worlds shortest trains, private cars, torpedoes, and of course, Thomas. Train Set: Track Three Subscribe to SiriusXM Podcasts+ to listen to new episodes of 99% Invisible ad-free and a whole week early. Start a free trial now on Apple Podcasts or by visiting siriusxm.com/podcastsplus. Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.

LA might be the most extreme parking city on the planet. Parking regulations have made it nearly impossible to build new affordable housing, or to renovate old buildings. And parking has a massive impact on how the city looks. LA is chock full of commercial strip malls, where buildings sit alone and isolated in a sea of asphalt. And all of this is the result of one policy decision that has reshaped American cities for the last eighty years. Henry Grabar's Paved Paradise: How Parking Explains the World, tells a mesmerizing story about the strange and wonderful super-organism that is the modern American city. In a beguiling and often absurdly hilarious mix of history, politics, and reportage, Grabar brilliantly surveys the pain points of the nation’s parking crisis, from Los Angeles to Disney World to New York, stopping at every major American city in between. Paved Paradise Subscribe to SiriusXM Podcasts+ to listen to new episodes of 99% Invisible ad-free and a whole week early. Start a free trial now on Apple Podcasts or by visiting siriusxm.com/podcastsplus. Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.

In her new book Nuts and Bolts: Seven Small Inventions That Changed the World (in a Big Way), structural engineer Roma Agrawal identifies and examines the seven of most basic building blocks of engineering that have shaped the modern world: the nail, the wheel, the spring, the lens, the magnet, the string, and the pump. Click here to get the book! Available for pre-order at W. W. Norton in the US and Bookshop.org in the UK. Nuts and Bolts Subscribe to SiriusXM Podcasts+ to listen to new episodes of 99% Invisible ad-free and a whole week early. Start a free trial now on Apple Podcasts or by visiting siriusxm.com/podcastsplus. Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.

Bad closed captions can be entertaining, but they can be serious, too, because captions are a critical tool for lots of lots of people. There are the people learning a new language and of course captions are essential for people who are deaf or hard of hearing. In the US, that’s about 15% of the adult population. Craptions Subscribe to SiriusXM Podcasts+ to listen to new episodes of 99% Invisible ad-free and a whole week early. Start a free trial now on Apple Podcasts or by visiting siriusxm.com/podcastsplus. Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.

There's a new movie out called Pinball: The Man Who Saved the Game. It’s a fun and extremely meta biopic telling the story of Roger Sharpe, who, with one perfect shot, helped legalize pinball in New York. That’s right – pinball was banned in many states up until the 1970s. We told that story and interviewed the REAL Roger about, oh, 400 episodes or so ago. So if you haven’t gone that far back in the catalog, we wanted to give you a free replay. After that, we’ve got a new segment with Keith Elwin, a tournament champion who made the move into designing pinball machines. For Amusement Only (Free Replay) Subscribe to SiriusXM Podcasts+ to listen to new episodes of 99% Invisible ad-free and a whole week early. Start a free trial now on Apple Podcasts or by visiting siriusxm.com/podcastsplus. Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.

Last year, Roman Mars teamed up with Hank Green to guest host Dear Hank & John -- this year he's back on the Greens' show once again, but this time with Hank's brother John Green (Turtles All the Way Down, The Fault in Our Stars, The Anthropocene Reviewed). In their podcast Dear Hank & John, "hosts John and Hank Green (who are also best-selling authors and pioneering YouTubers) offer both humorous and heartfelt advice about life’s big and small questions. They bring their personal passions to each episode by sharing the week’s news from Mars (the planet) and AFC Wimbledon (the third-tier English football club)." This week, guest host Roman Mars joins the show to discuss things like: Are roaches a moral failing? How do they do surgery on a fish? Why do only old people like stinky cheese? Subscribe to SiriusXM Podcasts+ to listen to new episodes of 99% Invisible ad-free and a whole week early. Start a free trial now on Apple Podcasts or by visiting siriusxm.com/podcastsplus. Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.

From scratchers to the Powerball, the lottery is the most popular form of gambling in the United States, even though the odds of winning a big jackpot is infinitesimally small. Jonathan D. Cohen is a historian and the author of the book For a Dollar and a Dream; State Lotteries in Modern America and he says it isn’t just the people playing the lottery who irrationally think the game will solve their financial woes, the states running the lotteries suffer from the same delusion. For a Dollar and a Dream Subscribe to SiriusXM Podcasts+ to listen to new episodes of 99% Invisible ad-free and a whole week early. Start a free trial now on Apple Podcasts or by visiting siriusxm.com/podcastsplus. Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.

Today the Netherlands has a reputation as a kind of bicycling paradise. Dutch people own more bicycles per capita than any other place in the world. The country has more than 20,000 miles of dedicated cycling paths. International policymakers make pilgrimages to the Netherlands to learn how to create good bike infrastructure. But none of that was inevitable. It wasn't something that magically emerged from Dutch culture. In fact, in the 1960s and 70s, it looked like the Netherlands would follow the same path as the United States. The Dutch had fallen in love with cars and they were rebuilding their cities to make room for them. It was only because of a multi-decade pro-cycling movement that cars didn't take over the country entirely. De Fiets is Niets Subscribe to SiriusXM Podcasts+ to listen to new episodes of 99% Invisible ad-free and a whole week early. Start a free trial now on Apple Podcasts or by visiting siriusxm.com/podcastsplus. Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.