Radiolab

First aired back in 2009, this episode is all about one thing, or rather a collection of things. Whether you love 'em or hate 'em, chances are you rely on numbers every day of your life. Where do they come from, and what do they really do for us? This hour: stories of how numbers confuse us, connect us, and even reveal secrets about us. Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com...

As a lifeguard, a paramedic, and then an ER doctor, Blair Bigham found his calling: saving lives. But when he started to work in the ICU, he slowly realized that sometimes keeping people (and their hopes) alive just prolongs the suffering. He wrote a book arguing that a too-late death is just as bad as a too-early one, and that physicians and the public alike need to get better at accepting the in...

In this short episode that first aired in 2011, a neurologist issues a dare to a ragtime piano player and a famous conductor. When the two men face off in an fMRI machine, the challenge is so unimaginably difficult that one man instantly gives up. But the other achieves a musical feat that ought to be impossible. Reporter Jessica Benko went to Michigan to visit Bob Milne, one of the best ragtime p...

Could puberty get any more awkward? Turns out, yes. Writer Patrick Burleigh started going through puberty as a toddler. He had pubic hair before he was two years old and a mustache by middle school. All of this was thanks to a rare genetic mutation that causes testotoxicosis, also known as precocious puberty. From the moment he was born, abnormally high levels of testosterone coursed through his b...

The definition of life is in flux, complexity is overrated, and humans are shrinking. Viruses are supposed to be sleek, pared-down, dead-eyed machines. But when one microbiologist stumbled upon a GIANT virus, hundreds of times bigger than any seen before, all that went out the window.  The discovery opened the door not only to a new cast of microscopic characters with names like Mimivirus, Mamavir...

In this episode we introduce you to a part of our bodies that was invisible to Western scientists until about five years ago; it’s called "the interstitium," a vast network of fluid channels inside the tissues around our organs that scientists have just begun to see, name, and understand. Along the way we look at how new technologies rub up against long-standing beliefs, and how millions of scient...

Back when Robert was kid, he had a chance encounter with then President John F. Kennedy. The interaction began with a hello and ended with a handshake. And like many of us who have touched greatness, 14 year old Robert was left wondering if maybe some of Kennedy would stay with him. Back in 2017, when this episode first aired, Robert found himself still pondering that encounter and question. And s...

Back in February of 2022, anyone who knew anything thought the War in Ukraine would be over in a few weeks. Russia simply had more bodies to fight with and more steel to kill with. Fast-forward to today, however, and the war is anything but over. Ukraine has held and regained territory with shocking resilience. Stranger still, a small, cheap gadget that up until now was little more than a toy, has...

While scouring the Sonoran Desert for objects left behind by migrants crossing into the United States, anthropologist Jason De León happened upon something he didn't expect to get left behind: a human arm, stripped of flesh. This macabre discovery sent him reeling, needing to know what exactly happened to the body, and how many migrants die that way in the wilderness. In researching border-crosser...

While scouring the Sonoran Desert for objects left behind by migrants crossing into the United States, anthropologist Jason De León happened upon something he didn't expect to get left behind: a human arm, stripped of flesh. This macabre discovery sent him reeling, needing to know what exactly happened to the body, and how many migrants die that way in the wilderness.  In researching border-crosse...

While scouring the Sonoran Desert for objects left behind by migrants crossing into the United States, anthropologist Jason De León happened upon something he didn't expect to get left behind: a human arm, stripped of flesh. This macabre discovery sent him reeling, needing to know what exactly happened to the body, and how many migrants die that way in the wilderness. In researching border-crosser...

Producer Sindhu Gnanasambandan wants to know how she can live the longest feeling life possible. The answer leads her on a journey to make one week feel like two. And the journey leads her to a whole new answer. Special thanks to Jo Eidman, Nathan Peereboom, Kristin Lin, Stacey Reimann, Ash Sanders… and an extra special thanks to Jae Minard for editorial support EPISODE CREDITSReported by - Sindhu...

Originally aired in 2018, this episode features reporter Brena Farrell as a new mom. Her son gave her and her husband a scare -- prompting them to call Poison Control. For Brenna, the experience was so odd, and oddly comforting, that she decided to dive into the birth story of this invisible network of poison experts, and try to understand the evolving relationship we humans have with our poisonou...

Summer 2023 was a pretty scary one for the planet. Global temperatures in June and July reached record highs. And over in the North Atlantic Sea, the water temperature spiked to off-the-chart levels. Some people figured that meant we were about to go over the edge, doomsday. In the face of this, Hank Green (a long time environmentalist and science educator behind SciShow , Crash Course , and more)...

Most of us would sacrifice one person to save five. It’s a pretty straightforward bit of moral math. But if we have to actually kill that person ourselves, the math gets fuzzy. That’s the lesson of the classic Trolley Problem, a moral puzzle that fried our brains in an episode we did almost 20 years ago, then updated again in 2017. Historically, the questions posed by The Trolley Problem are great...

Today, the story of an idea. An idea that some people need, others reject, and one that will, ultimately, be hard to let go of.  Special Thanks to Carl Zimmer, Eric Turkheimer, Andrea Ganna, Chandler Burr, Jacques Balthazart, Sean Mckeithan, Joe Osmundson, Jennifer Brier, Daniel Levine-Spound, Maddie Sofia, Elie Mystal, Heather Radke EPISODE CREDITS: Reported by - Matt KieltyProduced by - Matt Kie...

In this episode from 2007, we take you on a tour of language, music, and the properties of sound. We look at what sound does to our bodies, our brains, our feelings… and we go back to the reason we at Radiolab tell you stories the way we do.  First, we look at Diana Deutsch’s work on language and music, and how certain languages seem to promote musicality in humans. Then we meet Psychologist Anne...

A couple years ago, our producer Annie McEwen listened to an audio documentary that, she said, “tore my heart wide open.” That episode , “Finn and the Bell,” ( https://zpr.io/TDjwQuXFDSz6 ) by independent producer Erica Heilman (maker of the podcast  Rumble Strip ), went on to win some of the biggest awards in audio ( including a Peabody , https://zpr.io/tu4hwhKQ3TWN ), and the rest of the staff f...

When we think of China today, we think of a technological superpower. From Huawei and 5G to TikTok and viral social media, China is stride for stride with the United States in the world of computing. However, China’s technological renaissance almost didn’t happen. And for one very basic reason: The Chinese language, with its 70,000 plus characters, couldn’t fit on a keyboard.  Today, we tell the s...

Matthew Herrick was sitting on his stoop in Harlem when something weird happened. Then, it happened again. And again. It happened so many times that it became an absolute nightmare—a nightmare that haunted his life daily and flipped it completely upside down. What stood between Matthew and help were 26 little words. These 26 words, known as Section 230, are the core of an Internet law that coats t...

In online news, stories live forever. The tipsy photograph of you at the college football game? It’s there. That news article about the political rally you were marching at? It’s there. A charge for driving under the influence? That’s there, too. But what if... it wasn’t? Several years ago a group of journalists in Cleveland, Ohio, tried an experiment that had the potential to turn things upside d...

In 1908, on a sunny, clear, quiet morning in Siberia, witnesses recall seeing a blinding light streak across the sky, and then… the earth shook, a forest was flattened, fish were thrown from streams, and roofs were blown off houses. The “Tunguska event,” as it came to be known, was one of the largest extraterrestrial impact events in Earth’s history. But what kind of impact—what exactly struck the...

Since the beginning of the space program, we’ve expected astronauts to be fully-abled athletic overachievers—one-part science geeks, two-part triathletes—a mix the writer Tom Wolfe called “the right stuff.” But what if, this whole time, we’ve had it wrong? In this episode from 2022, reporter Andrew Leland joins blind Linguistics Professor Sheri Wells-Jensen and a crew of 11 other disabled people....

At a tree ring conference in the relatively treeless city of Tucson, Arizona, three scientists walk into a bar. The trio gets to talking, trying to explain a mysterious set of core samples from the Florida Keys. At some point, they come up with a harebrained idea: put the tree rings next to a seemingly unrelated dataset. Once they do, they notice something that no one has ever noticed before, a fo...

This is a story about your butt. It’s a story about how you got your butt, why you have your butt, and how your butt might be one of the most important and essential things for you being you, for being human.  In this episode from 2019, Reporter Heather Radke and Producer Matt Kielty talk to two researchers who followed the butt from our ancient beginnings through millions of years of evolution, a...