The world’s population has never been bigger, and it’s still growing. but there’s a movement of “pronatalists” who see the slowing birth rate in wealthy, educated populations as a doomsday scenario in the making—and they’ve found their spokesman in one Elon Musk.Guest: Sophie Alexander, reporter for BloombergWant more What Next TBD? Subscribe to Slate Plus to access ad-free listening to the whole What Next family and all your favorite Slate podcasts. Subscribe today on Apple Podcasts by clicking “Try Free” at the top of our show page. Sign up now at slate.com/whatnextplus to get access wherever you listen.Public.com+Public Investing: All investing involves risk. Brokerage services for US listed securities, options and bonds in a self-directed brokerage account are offered by Public Investing, member FINRA & SIPC. Not investment advice. Public Investing offers a High-Yield Cash Account where funds from this account are automatically deposited into partner banks where they earn interest and are eligible for FDIC insurance; Public Investing is not a bank.Cryptocurrency trading services are offered by Bakkt Crypto Solutions, LLC (NMLS ID 1828849), which is licensed to engage in virtual currency business activity by the NYSDFS. Cryptocurrency is highly speculative, involves a high degree of risk, and has the potential for loss of the entire amount of an investment. Cryptocurrency holdings are not protected by the FDIC or SIPC. . See public.com/#disclosures-main for more information. Learn more about your ad choices. Visit megaphone.fm/adchoices

The story of IUDs is a story of technology, reproductive rights, shortcomings in communication about women’s health, and politics. Guest: Mia Armstrong-Lopez, managing editor at ASU Media Enterprise and author of a recent piece on IUDs for Slate. Want more What Next TBD? Subscribe to Slate Plus to access ad-free listening to the whole What Next family and all your favorite Slate podcasts. Subscribe today on Apple Podcasts by clicking “Try Free” at the top of our show page. Sign up now at slate.com/whatnextplus to get access wherever you listen. Learn more about your ad choices. Visit megaphone.fm/adchoices

Saying any one storm or heat wave or weather in general was “caused by climate change” is tricky—summer is, after all, usually pretty hot, and storms happen. But researchers are working on a model that brings “climate change” from abstract into the particular.  Guest: Daniel Swain, climate scientist at the UCLA Institute of the Environment and Sustainability, studying how extreme events are changing on a warming Earth.Want more What Next TBD? Subscribe to Slate Plus to access ad-free listening to the whole What Next family and all your favorite Slate podcasts. Subscribe today on Apple Podcasts by clicking “Try Free” at the top of our show page. Sign up now at slate.com/whatnextplus to get access wherever you listen. Learn more about your ad choices. Visit megaphone.fm/adchoices

Tech reporter Kashmir Hill discusses the use of driving data by automakers to influence insurance prices. The podcast explores concerns over data collection, consent issues, and the debate on using real-time driving data for setting auto insurance prices.

Amazon has installed digital palm readers at Whole Foods. The reader scans your palm, collecting biometric data, and links it to your credit card to pay for your groceries. What does exchanging vein mapping for eggs and butter mean for the future of data security and in-person shopping. Guest: Emily Moore, freelance tech and food journalistWant more What Next TBD? Subscribe to Slate Plus to access ad-free listening to the whole What Next family and all your favorite Slate podcasts. Subscribe today on Apple Podcasts by clicking “Try Free” at the top of our show page. Sign up now at slate.com/whatnextplus to get access wherever you listen.Podcast production by Evan Campbell, Patrick Fort, and Cheyna Roth. Learn more about your ad choices. Visit megaphone.fm/adchoices

In 2021, one of the largest global law enforcement operations took place. It was all thanks to an encrypted phone service known as Anom, which was secretly run by the FBI. The program was a wild success. But did the agency take it too far? Guest: Joseph Cox, investigative reporter for 404 media and author of “Dark Wire, the Incredible True Story of the Largest Sting Operation Ever”Want more What Next TBD? Subscribe to Slate Plus to access ad-free listening to the whole What Next family and all your favorite Slate podcasts. Subscribe today on Apple Podcasts by clicking “Try Free” at the top of our show page. Sign up now at slate.com/whatnextplus to get access wherever you listen. Learn more about your ad choices. Visit megaphone.fm/adchoices

On Monday, Tim Cook announced Apple was getting into artificial intelligence. Is Apple about to do for A.I. what it did for personal computers and smartphones?Guest: Gerrit De Vynck, tech reporter for the Washington Post.Want more What Next TBD? Subscribe to Slate Plus to access ad-free listening to the whole What Next family and all your favorite Slate podcasts. Subscribe today on Apple Podcasts by clicking “Try Free” at the top of our show page. Sign up now at slate.com/whatnextplus to get access wherever you listen.Podcast production by Evan Campbell, Patrick Fort, and Cheyna Roth. Learn more about your ad choices. Visit megaphone.fm/adchoices

It’s hard to imagine music fans mourning a break-up of Ticketmaster and its parent company Live Nation, as a Department of Justice lawsuit requests. But even with this monopolistic middleman out of the way, touring musicians still seem destined to struggle financially.Guest: Laura Jane Grace, musicianWant more What Next TBD? Subscribe to Slate Plus to access ad-free listening to the whole What Next family and all your favorite Slate podcasts. Subscribe today on Apple Podcasts by clicking “Try Free” at the top of our show page. Sign up now at slate.com/whatnextplus to get access wherever you listen.Podcast production by Evan Campbell, Patrick Fort, and Anna Phillips. Learn more about your ad choices. Visit megaphone.fm/adchoices

How well is the Biden administration coaxing semiconductor companies to build their chips in the United States? Compared to Taiwan, South Korea, Japan…or even mainland China, things are just okay.Guest: Asa Fitch, reporter for the Wall Street Journal, covering the semiconductor industry.Want more What Next TBD? Subscribe to Slate Plus to access ad-free listening to the whole What Next family and all your favorite Slate podcasts. Subscribe today on Apple Podcasts by clicking “Try Free” at the top of our show page. Sign up now at slate.com/whatnextplus to get access wherever you listen. Learn more about your ad choices. Visit megaphone.fm/adchoices

“Fecal microbial transplants” treat someone’s unhealthy gut with poop from someone else’s healthy gut, and proponents of FMT claim it can help treat everything from IBS to autism. But if your doctor isn’t ready to fill you up with someone else’s poop, the internet will happily oblige. Guest: Luke Winkie, Slate staff writer who published “The Poop Broker.”Want more What Next TBD? Subscribe to Slate Plus to access ad-free listening to the whole What Next family and all your favorite Slate podcasts. Subscribe today on Apple Podcasts by clicking “Try Free” at the top of our show page. Sign up now at slate.com/whatnextplus to get access wherever you listen. Learn more about your ad choices. Visit megaphone.fm/adchoices