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.

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.

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 office is using Article IV and the 10th Amendment to protect the state from federal overreach.

The 99% Invisible Breakdown of the Constitution

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.

How a fence meant to protect sheep transformed the entire Australian landscape.

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.

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.

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.

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.

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 strange history of a punctuation mark that makes writing feel human, and why people now think it proves the opposite.

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.

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.

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.

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.

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.

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.org

Follow Audio Flux on Instagram: @audiofluxing

Featured Audio Flux stories include:

• The Sound of Silence by Gregory Warner and Sana Krasikov
• In Between Silence by Talia Augustidis
• The Ghost on Side B by Katelyn Hale Wood with sound design by Alan Goffinski
• First Words by Peter Lang-Stanton
• Red Card by Vivien Schütz and Laura Rojas Aponte

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.

A young designer faces an impossible brief and discovers the spark that will define his legendary career.

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.

Performance changing gear, a Titanic era nurse with unbelievable resilience, and an ingenious art vending project reveal how innovation and endurance shape unexpected worlds.

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.