The Speed of Light for Building Pyramids

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.

13 Juni 202334min

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.

6 Juni 202336min

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.

31 Maj 202343min

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.

23 Maj 202331min

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.

17 Maj 202326min

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.

9 Maj 202337min

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.

2 Maj 202332min

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.

25 Apr 202329min