Economy

For thousands of years, getting light was a huge hassle. You had to make candles from scratch. This is not as romantic as it sounds. You had to get a cow, raise the cow, feed the cow, kill the cow, get the fat out of the cow, cook the fat, dip wicks into the fat. All that--for not very much light. Now, if we want to light a whole room, we just flip a switch.

The history of light explains why the world today is the way it is. It explains why we aren't all subsistence farmers, and why we can afford to have artists and massage therapists and plumbers. (And, yes, people who make podcasts about the history of light.) The history of light is the history of economic growth--of things getting faster, cheaper, and more efficient.

On today's show: How we got from dim little candles made out of cow fat, to as much light as we want at the flick of a switch.

Today's show was hosted by Jacob Goldstein and David Kestenbaum. It was originally produced by Caitlin Kenney and Damiano Marchetti. Today's rerun was produced by James Sneed, and edited by Jenny Lawton. It was fact-checked by Sierra Juarez. Engineering by Valentina Rodríguez Sánchez. Alex Goldmark is Planet Money's executive producer.

Help support Planet Money and hear our bonus episodes by subscribing to Planet Money+ in Apple Podcasts or at plus.npr.org/planetmoney.

The Bronx-born rapper sits with A Martínez to discuss how he advocates for price transparency and what he wants politicians in D.C. to do about it.

Maybe you've heard these things on social media, in the news, and take them as fact: More than half of the adults in the US live paycheck to paycheck, the trade deficit is always bad, and making the super wealthy pay their fair share will fix everything. Well, the truth isn't so simple. Today on the show: economic mythbusting. We take three factoids about the American economy and run them through the fact checkers.

MERCH! You asked for it. We got it. After rebranding our podcast earlier this year, we decided it was time to create our own merch. On today's show, a brief oral history of early merch, how to score an Indicator t-shirt, and the winning name of our new mascot.

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Planet Money spends a day with a San Francisco junkman as he makes a living off of other people’s trash. We learn about the scrap metals commodities markets and the second lives of random objects.

There is a constant arms race between law enforcement and criminals, especially when it comes to technology. For years, law enforcement has been frustrated with encrypted messaging apps, like Signal and Telegram. And law enforcement has been even more frustrated by encrypted phones, specifically designed to thwart authorities from snooping.

But in 2018, in a story that seems like it's straight out of a spy novel, the FBI was approached with an offer: Would they like to get into the encrypted cell phone business? What if they could convince criminals to use their phones to plan and document their crimes — all while the FBI was secretly watching? It could be an unprecedented peek into the criminal underground.

To pull off this massive sting operation, the FBI needed to design a cell phone that criminals wanted to use and adopt. Their mission: to make a tech platform for the criminal underworld. And in many ways, the FBI's journey was filled with all the hallmarks of many Silicon Valley start-ups.

On this show, we talk with journalist Joseph Cox, who wrote a new book about the FBI's cell phone business, called Dark Wire. And we hear from the federal prosecutor who became an unlikely tech company founder.

Help support Planet Money and hear our bonus episodes by subscribing to Planet Money+ in Apple Podcasts or at plus.npr.org/planetmoney.

It's time for The Indicator Quiz! We test you, dear listener, on your knowledge of topics that we've covered on The Indicator! Today's quiz focuses on ch-ch-changes. (That's a David Bowie reference, kids!) We're covering changes in the economy, the environment, the rental market, you get the picture. We're even tossing in a question about an AI-resurrected rapper. Play along with us and see how you do! Are you interested in being a contestant on our next Indicator Quiz? Email us your name and phone number at indicator@npr.org and put "Indicator Quiz" in the subject line.