The U.S. surgeon general, Dr. Vivek Murthy, says social media poses a “profound risk of harm” to young people. Why do some in the tech industry disagree?Then, Ajeya Cotra, an A.I. researcher, on how A.I. could lead to a doomsday scenario.Plus: Pass the hat. Kevin and Casey play a game they call HatGPT.On today’s episode:Ajeya Cotra is a senior research analyst at Open PhilanthropyAdditional reading:The surgeon general issued an advisory about the risks of social media for young people.Ajeya Cotra has researched the existential risks that A.I. poses unless countermeasures are taken.Binance commingled customer funds and company revenue, former insiders told Reuters.BuzzFeed announced Botatouille, an A.I.-powered kitchen assistant.A Twitter bug caused the platform to restore deleted tweets.Gov. Ron DeSantis of Florida announced his presidential campaign in a Twitter Spaces event rife with glitches.Two former rivals, Uber and Waymo, are teaming up to bring driverless ride-hailing to Phoenix. Subscribe today at nytimes.com/podcasts or on Apple Podcasts and Spotify. You can also subscribe via your favorite podcast app here https://www.nytimes.com/activate-access/audio?source=podcatcher. For more podcasts and narrated articles, download The New York Times app at nytimes.com/app.