Late last month, President Trump announced that the United States would be restarting nuclear weapons tests after a break of over 30 years. We’ve since learned that they won’t be the explosive kind of tests, but this sent us down a rabbit hole — where we found a story about dinosaurs, Carl Sagan, and nuclear war. Because there was a moment in the not-so-distant past when we learned what drove the dinosaurs extinct... and that discovery, made during the Cold War, may have helped save humans from the same fate. This episode originally published in March 2025.Guests:David Sepkoski, Thomas M. Siebel Chair in History of Science at the University of Illinois and author of Catastrophic Thinking: Extinction and the Value of Diversity. Owen Brian Toon, professor of atmospheric and oceanic sciences at the University of Colorado Boulder.Alec Nevala-Lee, novelist, critic, and biographer and author of the forthcoming book Collisions: A Physicist's Journey from Hiroshima to the Death of the Dinosaurs. Ann Druyan, co-writer and co-creator of the television series Cosmos: A Personal Voyage. Andrew Revkin, science and environmental journalist.To access bonus episodes and listen to Throughline sponsor-free, subscribe to Throughline+ via Apple Podcasts or at plus.npr.org/throughline.Learn more about sponsor message choices: podcastchoices.com/adchoicesNPR Privacy Policy

The word "genocide" can seem like it’s everywhere right now: So it can be easy to forget that, fundamentally, it's a legal term that dates to World War II — and wasn’t used in court for half a century afterwards. Today on the show, the story of what happened during the Bosnian War in the 1990s and the work that went into building the legal case to prove genocide.To access bonus episodes and listen to Throughline sponsor-free, subscribe to Throughline+ via Apple Podcasts or at plus.npr.org/throughline.Learn more about sponsor message choices: podcastchoices.com/adchoicesNPR Privacy Policy

Stuck in traffic? Glued to your desk chair? Folding yet another pile of your kids’ laundry? We GOT you!! Take a break, turn up the volume, and shake it out with this special episode of Throughline, a tribute to dance music, all songs composed by our very own Ramtin Arablouei.To access bonus episodes and listen to Throughline sponsor-free, subscribe to Throughline+ via Apple Podcasts or at plus.npr.org/throughline.Learn more about sponsor message choices: podcastchoices.com/adchoicesNPR Privacy Policy

What powers the global internet? The answer might surprise you: not satellites, but hundreds of thin cables that run along the ocean floor. They’re an absolutely essential technology that’s also incredibly fragile — so fragile that in the beginning, most people thought they couldn't possibly work. Today on the show: the story of a man who did think they could work… and the lengths he went to to try and connect the world.Guests:Bill Burns, former BBC broadcast engineer and founder of atlantic-cable.com Cyrus Field IV, great-great-grandson of Cyrus FieldAllison Marsh, professor at the University of South Carolina and historian of technology Ben Roberts, strategic advisor on Subsea Cable Economics for Connectivity at UNICEF who has been building cable network in Africa for the past two decadesTo access bonus episodes and listen to Throughline sponsor-free, subscribe to Throughline+ via Apple Podcasts or at plus.npr.org/throughline.Learn more about sponsor message choices: podcastchoices.com/adchoicesNPR Privacy Policy

Israel and Hamas have agreed to a plan to end fighting in Gaza, just over two years after the Hamas-led attack on Israel on October 7th, 2023 and Israel’s subsequent bombardment and invasion of Gaza. As we wait to see what happens next, we’re revisiting our episodes looking at the history of major players on both sides of the conflict. Last week, we looked at the history of Hamas; if you missed that, go back and check it out. This week, we’re bringing you the story of the rise of right wing politics in Israel and President Benjamin Netanyahu’s political career. This episode first ran in 2024.Guests: Amjad Iraqi, senior analyst for Israel/Palestine at the International Crisis Group and former senior editor at +972 Magazine. Natasha Roth-Rowland, historian and director of research and analysis at Diaspora Alliance, an international organization that combats antisemitism. Sara Yael Hirschhorn, historian,visiting professor at the University of Haifa and fellow at the Jewish People Policy Institute.To access bonus episodes and listen to Throughline sponsor-free, subscribe to Throughline+ via Apple Podcasts or at plus.npr.org/throughline.Learn more about sponsor message choices: podcastchoices.com/adchoicesNPR Privacy Policy

With peace talks once again underway between Israel and Hamas, and hopes again growing for a permanent ceasefire, we’re bringing you our episode on the origins of Hamas: where it came from, how its influence grew, and what it represents. Next week, our episode on Benjamin Netanyahu and the rise of Israel’s right wing. This episode first ran in November 2023.We've done episodes on Hamas, Israel, Lebanon, Iran, and more. Find them all in our series, "The Cycle".To access bonus episodes and listen to Throughline sponsor-free, subscribe to Throughline+ via Apple Podcasts or at plus.npr.org/throughline.Learn more about sponsor message choices: podcastchoices.com/adchoicesNPR Privacy Policy

Journalism is under unprecedented threat worldwide. At least 220 journalists have been killed in Gaza alone since the October 7th, 2023 Hamas-led attack on Israel; the Committee to Protect Journalists says it’s the deadliest conflict for journalists the group has ever documented. In conflicts around the world, it’s war reporters who write the first draft of history. But getting to the front lines, finding the truth, and reporting it is easier said than done. Today on the show: war reporters, and what’s at stake if they can’t do their jobs.To access bonus episodes and listen to Throughline sponsor-free, subscribe to Throughline+ via Apple Podcasts or at plus.npr.org/throughline.Learn more about sponsor message choices: podcastchoices.com/adchoicesNPR Privacy Policy

Life can be tough. Every day brings new challenges. And in order to get through the waking hours we need rest. Good quality sleep. In this bonus episode, a companion to our episode "The Way We Dream," we offer you a 30-minute audio journey into the deep. A smooth trip into the place where our minds are free from the confines of our self awareness, our dreams. This episode originally published in January 2022.To access bonus episodes and listen to Throughline sponsor-free, subscribe to Throughline+ via Apple Podcasts or at plus.npr.org/throughline.Learn more about sponsor message choices: podcastchoices.com/adchoicesNPR Privacy Policy

The alleged link between vaccines and autism is back in the news this week, being regularly speculated on by both President Trump and Health and Human Services secretary Robert F. Kennedy Jr. The claim has been repeatedly disproven: there is no evidence that vaccines and autism are related. But the myth is powerful. In this episode: the roots of the modern anti-vaccine movement, and of the fears that still fuel it – from a botched polio vaccine, to the discredited autism study, to today. This episode originally published in February 2025. Guests:Paul Offit, director of the Vaccine Education Center at the Children's Hospital of Philadelphia, and a professor of pediatrics at the University of Pennsylvania School of MedicineElena Conis, historian of medicine and public health and a professor in journalism and history at the University of California, BerkeleyArthur Allen, senior correspondent for nonprofit KFF Health News and author of Vaccine: The Controversial Story of Medicine's Greatest LifesaverTo access bonus episodes and listen to Throughline sponsor-free, subscribe to Throughline+ via Apple Podcasts or at plus.npr.org/throughline.Learn more about sponsor message choices: podcastchoices.com/adchoicesNPR Privacy Policy

The U.S. immigration detention system is spread out across federal facilities, private prisons, state prisons, and county jails. It’s grown under both Democratic and Republican presidents. And it’s been offered up as a source of revenue for over a century, beginning with the first contracts between the federal government and sheriffs along the Canadian border.Guests:Brianna Nofil, assistant professor of history at The College of William and Mary author of The Migrant's Jail: An American History of Mass IncarcerationTo access bonus episodes and listen to Throughline sponsor-free, subscribe to Throughline+ via Apple Podcasts or at plus.npr.org/throughline.Love podcasts? For handpicked recommendations every Friday, subscribe to NPR’s Pod Club here.If you want to learn more about the history of Cuban migration to the U.S. and the Mariel Boatlift, check out season 2 of White Lies.Learn more about sponsor message choices: podcastchoices.com/adchoicesNPR Privacy Policy

The U.S. - Mexico border, according to a video on the official White House website, is very quiet: nothing but tires crunching on gravel and the wind whistling around a high, solid-looking wall. But that's not the whole story. Today on the show, how that border went from a line in the sand, to a fence, to a wall.Guests:Rachel St. John, associate professor of history at U.C. Davis, and author of Line in the Sand: A History of the Western US Mexico BorderMiguel Levario, associate professor of history at Texas Tech University and author of Militarizing the Border: When Mexicans Became the EnemySilvestre Reyes, former Congressman (D-TX), and former Border Patrol Sector Chief Eduardo Contreras, realtor in Brownsville, TexasTo access bonus episodes and listen to Throughline sponsor-free, subscribe to Throughline+ via Apple Podcasts or at plus.npr.org/throughline.Learn more about sponsor message choices: podcastchoices.com/adchoicesNPR Privacy Policy

What is ICE? What was it created to do? And what’s changed in 2025? Today on the show, the history of Immigration and Customs Enforcement and how it tracks the story of immigration, and politics, in the U.S.Guests:Peter Markowitz, professor at Cardozo School of Law in New York City and founder of the Kathryn O. Greenberg Immigration Justice Clinic.Rodger Werner is co-author of “The History and Evolution of Homeland Security in the United States” and currently employed by the Department of Homeland Security. The views he expresses in this episode are his own and do not represent the views of DHS or the U.S. government.To access bonus episodes and listen to Throughline sponsor-free, subscribe to Throughline+ via Apple Podcasts or at plus.npr.org/throughline.Learn more about sponsor message choices: podcastchoices.com/adchoicesNPR Privacy Policy