The Builders: How Beavers Mend Our Planet

Few mammals have a bigger positive impact on the planet than the beaver. With its bright orange buck teeth, the creature is an expert engineer that brings life wherever it waddles and even fights fires. Our story begins in the Bronx river, once known as the  “open sewer” of New York City. After some humans decide to clean it up, we meet one of the river’s residents - José the beaver. We learn about the US government parachuting beavers out of planes into the mountains. And finally head to California where we discover how one beaver family saved acres of land from burning. Special thanks to author Ben Goldfarb, Christian Murphy from the Bronx River Alliance and Dr. Emily Fairfax. Subscribe to our newsletter if you haven’t already, follow us on instagram @terrestrialspodcast, and leave us a ⭐⭐⭐⭐⭐ rating and review on your podcast app - it helps curious listeners find us!KEEP LEARNING!Read Ben Goldfarb’s book Eager: The Surprising, Secret Life of Beavers and Why They Matter. Watch the US government drop beavers out of planes into mountains. Read Leila Philip’s Beaverland: How One Weird Rodent Made America.Watch Leave It to Beavers, a documentary about beavers restoring rivers and wetlands.Read about how reintroducing beavers can enhance ecological health.Read about how beaver dams help wildfire-ravaged ecosystems recover.Terrestrials was created by Lulu Miller with WNYC Studios. This episode was produced by Ana González and sound-designed by Mira Burt-Wintonick. Our team includes Alan Goffinski, Joe Plourde and Tanya Chawla. Fact checking was by Diane Kelly. Our advisors for this show were Ana Luz Porzecanski, Nicole Depalma, Liza Demby and Tovah Barocas.Support for Terrestrials also comes from the Simons Foundation, the Arthur Vining Davis Foundations, and the John Templeton Foundation. HEY GROWN-UPS!Love the show? Leave us a ⭐⭐⭐⭐⭐ rating and review on your podcast app—it helps curious listeners find us!We want to hear from you! Share your thoughts about Terrestrials with us.Subscribe to our weekly newsletter for bite-sized essays, activities, and ways to connect with the show.Follow us on YouTube, Instagram, and TikTok for behind-the-scenes extras and more.Listen to original music from Terrestrials on Spotify, Apple Music, or our music page.Got a badgering question for the team? Email us at [email protected] or submit a voice memo with your name, age, and your question using this form!Terrestrials is made possible in part by listeners like you. Support the show by joining Radiolab’s membership program, The Lab—and we’ll send you a special thank-you gift from our team!

Over a billion lightyears ago, in the darkness of outer space, a collision of black holes sent out a fleet of invisible waves that were headed right toward planet Earth. The waves were so powerful they could ripple spacetime but most people on Earth didn't believe the waves were real. SPOILER ALERT: The waves are called gravitational waves and…they are real! Astrophysicist Dr. Wanda Díaz Merced tells the story of what happened when they hit Earth in 2015 and how scientists came to learn to use senses beyond eyesight to detect the waves. We also learn from Dr. Stavros Katsanevas about the building of a giant gravitational wave catcher called “The Interferometer.” This episode also explores how to persist in the face of doubt as we learn Wanda's tale of going blind and learning how to listen to the stars. Learn about the storytellers, listen to music, and dig deeper into the stories you hear on Terrestrials with activities you can do at home or in the classroom on our website, Terrestrialspodcast.org.  Watch the interferometer come to life, disco style, and find even MORE original Terrestrials fun on our Youtube. Badger us on Social Media: @radiolab and #TerrestrialsPodcast  Support for Terrestrials is provided by Science Sandbox, a Simons Foundation Initiative, and the Arthur Vining Davis Foundations. More from Terrestrials  The Shovels: Dig Deeper For each episode of Terrestrials, we provide a selection of activity sheets, drawing prompts, musical lessons, and more. We call them “shovels” because we hope they will help you (and your friends, family, students, neighbors, etc) dig more deeply into the world! You can do them at home, in the classroom, outside, or in the privacy of your own mind. We hope you enjoy!If you want to share what you’ve made, ask an adult share it on social media using #TerrestrialsPodcast and make sure to tag @Radiolab Draw -  Use your ears to draw! In this very special drawing prompt, Wendy Mac and the DrawTogether team pull in an actual rockstar to play you various favorite sounds to draw. It's a feast for the mind, ears, and hands. Grab a pencil, pen, crayon, marker, anything, and check it out here! Play 🎶 - Learn how to play the chords to the song “UNIMAGINABLE” Do - Get crafty with a fun activity sheet!   This week’s storyteller is Dr. Wanda Díaz Merced. Want to keep learning? Check out these resources to learn about the time-bending power that is the gravitational wave: Get to Wanda a little better; watch her TED talk!Take a tour of the world’s first interferometer! (Free monthly tours in person in Richland, WA)Train yourself to use sound for signal detection in astronomy. Learn more about asteroseismology with the wonderful Hank Green!Spooked by the idea of the infinite universe? Listen to John Green’s “Against Nihilism” (probably best for 13 and up)! Terrestrials is a production of WNYC Studios, created by Lulu Miller. This episode is produced by Ana González, Alan Goffinski and Lulu Miller. Original Music by Alan Goffinski. Help from Suzie Lechtenberg, Sarah Sandbach, Natalia Ramirez, and Sarita Bhatt. Fact-check by Natalie Meade. Sound design by Phoebe Wang with additional engineering by Joe Plourde. Our storytellers this week are Dr. Wanda Díaz Merced and Dr. Stavros Katsanevas. Transcription by Caleb Codding. Our advisors are Theanne Griffith, Aliyah Elijah, Dominique Shabazz, John Green, Liza Steinberg-Demby, Alice Wong, and Tara Welty. Terrestrials is supported in part by Science Sandbox, an initiative of the Simons Foundation. Have questions for us, badgers? Badger us away! Your parent/guardian should write to us along with you, so we know you have their permission, and for maybe even having your ideas mentioned on the show. Email [email protected] HEY GROWN-UPS!Love the show? Leave us a ⭐⭐⭐⭐⭐ rating and review on your podcast app—it helps curious listeners find us!We want to hear from you! Share your thoughts about Terrestrials with us.Subscribe to our weekly newsletter for bite-sized essays, activities, and ways to connect with the show.Follow us on YouTube, Instagram, and TikTok for behind-the-scenes extras and more.Listen to original music from Terrestrials on Spotify, Apple Music, or our music page.Got a badgering question for the team? Email us at [email protected] or submit a voice memo with your name, age, and your question using this form!Terrestrials is made possible in part by listeners like you. Support the show by joining Radiolab’s membership program, The Lab—and we’ll send you a special thank-you gift from our team!

Pizza is one of the world’s most beloved foods. But as much as we love the way it tastes, the secrets of its ingredients are even yummier to discover. We explore the surprising sounds tomatoes make when they’re stressed, how wheat became integral to human survival and how mold is sometimes... delicious?  This episode also features live tap-dancing, mind-melting cheese facts and what might be the Songbud’s catchiest song yet.Special thanks to Little Island for having us. If you’re in NYC,  go check them out. It’s free to wander around, there are hidden musical instruments to see, gorgeous plants and so much more. Visit littleisland.org to learn more.And huge thanks to our guest performers - tap dancer John Manzari,  who you can catch performing or teaching tap lessons around NYC, percussionist Caitlin Cawley from Mantra Percussion, Josh Windsor, the Associate Director of Caves at Murray's Cheese in New York City, a world-famous cheese shop with tons of cheeses, classes and fun family events, and WNYC’s very own David Gebel.This episode was originally produced and developed in front of a live audience at Little Island with Producing Artistic Director Zack Winokur and Executive Director Laura Clement.PLUS, TERRESTRIALS WILL BE BACK IN TWO WEEKS - STARTING SEPTEMBER 18TH – WITH BRAND NEW EPISODES DROPPING EVERY OTHER WEEK. Visit terrestrialspodcast.org to sign up for our newsletter and follow us on instagram @terrestrialspodcast for updates. HEY GROWN-UPS!Love the show? Leave us a ⭐⭐⭐⭐⭐ rating and review on your podcast app—it helps curious listeners find us!We want to hear from you! Share your thoughts about Terrestrials with us.Subscribe to our weekly newsletter for bite-sized essays, activities, and ways to connect with the show.Follow us on YouTube, Instagram, and TikTok for behind-the-scenes extras and more.Listen to original music from Terrestrials on Spotify, Apple Music, or our music page.Got a badgering question for the team? Email us at [email protected] or submit a voice memo with your name, age, and your question using this form!Terrestrials is made possible in part by listeners like you. Support the show by joining Radiolab’s membership program, The Lab—and we’ll send you a special thank-you gift from our team!

We’re back with an episode from the Radiolab archive. Horseshoe crabs have been around for a long time. They outlived the dinosaurs, survived all mass extinctions and witnessed the sprouting of the Earth’s first trees. The secret to their longevity? Their baby blue blood. Which has been saving both their lives and ours. Lulu and Radiolab co-host, Latif Nasser,  head to one of these bleeding facilities to learn how horseshoe crab blood became indispensable for modern medicine. And how this vampirish relationship humans have with the crabs might also be crucial to keeping them alive.  Terrestrials will be back in September 2025 with all new episodes airing every other week! SIgn up for our newsletter here and follow us on Instagram @terrestrialspodcast for updates.If you want to learn more about how miraculous horseshoe crabs are, check out:Alexis Madrigal, "The Blood Harvest" in The Atlantic, and Sarah Zhang's recent follow up in The Atlantic, "The Last Days of the Blue Blood Harvest" Deborah Cramer, The Narrow EdgeDeborah Cramer, "Inside the Biomedical Revolution to Save Horseshoe Crabs" in Audubon Magazine Richard Fortey, Horseshoe Crabs and Velvet WormsIan Frazier, "Blue Bloods"  in The New Yorker Lulu Miller's short story, "Me and Jane"  in Catapult MagazineJerry Gault, "The Most Noble Fishing There Is"  in Charles River's Eureka Magazine Glenn Gauvry's horseshoe crab research database HEY GROWN-UPS!Love the show? Leave us a ⭐⭐⭐⭐⭐ rating and review on your podcast app—it helps curious listeners find us!We want to hear from you! Share your thoughts about Terrestrials with us.Subscribe to our weekly newsletter for bite-sized essays, activities, and ways to connect with the show.Follow us on YouTube, Instagram, and TikTok for behind-the-scenes extras and more.Listen to original music from Terrestrials on Spotify, Apple Music, or our music page.Got a badgering question for the team? Email us at [email protected] or submit a voice memo with your name, age, and your question using this form!Terrestrials is made possible in part by listeners like you. Support the show by joining Radiolab’s membership program, The Lab—and we’ll send you a special thank-you gift from our team!

A color-changing creature many people assumed to be brainless outsmarts his human captors. SPOILER: The creature is an octopus! Author Sy Montgomery tells the story of one octopus named Inky who makes us question who we consider intelligent (and kissable) in the animal kingdom.  Learn about the storytellers, listen to music, and dig deeper into the stories you hear on Terrestrials with activities you can do at home or in the classroom on our website, Terrestrialspodcast.org.  Find MORE original Terrestrials fun on Youtube. And badger us on Social Media: @radiolab and #TerrestrialsPodcast  Terrestrials is a production of WNYC Studios, created by Lulu Miller. This episode is produced by Ana González, Alan Goffinski and Lulu Miller. Original Music by Alan Goffinski. Help from Suzie Lechtenberg, Sarah Sandbach, Natalia Ramirez, and Sarita Bhatt. Fact-check by Diane Kelley. Sound design by Mira Burt-Wintonick with additional engineering by Joe Plourde. Our storyteller this week is Sy Montgomery. Transcription by Caleb Codding. Our advisors are Theanne Griffith, Aliyah Elijah, Dominique Shabazz, John Green, Liza Steinberg-Demby, Tara Welty, and Alice Wong. Terrestrials is supported in part by Science Sandbox, an initiative of the Simons Foundation. HEY GROWN-UPS!Love the show? Leave us a ⭐⭐⭐⭐⭐ rating and review on your podcast app—it helps curious listeners find us!We want to hear from you! Share your thoughts about Terrestrials with us.Subscribe to our weekly newsletter for bite-sized essays, activities, and ways to connect with the show.Follow us on YouTube, Instagram, and TikTok for behind-the-scenes extras and more.Listen to original music from Terrestrials on Spotify, Apple Music, or our music page.Got a badgering question for the team? Email us at [email protected] or submit a voice memo with your name, age, and your question using this form!Terrestrials is made possible in part by listeners like you. Support the show by joining Radiolab’s membership program, The Lab—and we’ll send you a special thank-you gift from our team!

Today, we splash into the Hudson River Park with our Songbud to meet all kinds of crabs. With Siddartha and Carrie from  the Hudson River Park, Alan puts on waterproof rubber overalls, gets his hands dirty in the river and dives into the secret lives of Hudson crabs.Plus, CRAB WEEK is going on right now in New York City! It’s an annual shell-ebration that highlights the crabs of the Hudson River. Scuttle by for crabtastic activities throughout the park all week long! You’ll have the opportunity to try your hand at some crabby crafts, learn crabtivating facts and get your claws on a copy of our limited-edition Crab Week poster. Check out their entire shell-dule.And join us on August 6th + 7th in Little Island for our full-day takeover of the park. Join us at 10am for Wilderness Wonderland featuring scavenger hunts, live music, and more – including our friends from the Hudson River Park who will be on site with live critters! At 5pm, we will be performing a LIVE podcast taping  all about  PIZZA! The show’s free. There will be pizza. Join if you’re in NYC (or make this the reason you visit). Check out all of our other performances here. HEY GROWN-UPS!Love the show? Leave us a ⭐⭐⭐⭐⭐ rating and review on your podcast app—it helps curious listeners find us!We want to hear from you! Share your thoughts about Terrestrials with us.Subscribe to our weekly newsletter for bite-sized essays, activities, and ways to connect with the show.Follow us on YouTube, Instagram, and TikTok for behind-the-scenes extras and more.Listen to original music from Terrestrials on Spotify, Apple Music, or our music page.Got a badgering question for the team? Email us at [email protected] or submit a voice memo with your name, age, and your question using this form!Terrestrials is made possible in part by listeners like you. Support the show by joining Radiolab’s membership program, The Lab—and we’ll send you a special thank-you gift from our team!

Today we’re bringing you a live episode we taped in Boston. It’s about clam chowder. We’re sharing it now because we’re doing ANOTHER LIVE SHOW at Little Island in NYC on August 6th + 7th - and that one’s about PIZZA! The show’s free. There will be pizza. Join if you’re in NYC (or make this the reason you visit). Check out all of our other performances here.Lulu is a Bostonian who has never had clam chowder. Read that again. For some reason it always felt gross to her. So as an extreme challenge, we’re taking a closer look at clam chowder to see if it can become wondrous. Ana and Alan break down each ingredient - milk, potatoes, and finally clams - with a concoction of stories and guests. Then, if she’s convinced of clam chowder’s magic, Lulu will try clam chowder for the first time in her life. You can watch a full video taping of this episode here. Listen if you love clam chowder, but especially if you’re a chowda doubta. Special thanks to scientist Rachel Hutchison from the Woods Hole Oceanographic Sea Grant for all of her clam knowledge and WBUR’s CitySpace for hosting this event. Hope to see you in New York City!   HEY GROWN-UPS!Love the show? Leave us a ⭐⭐⭐⭐⭐ rating and review on your podcast app—it helps curious listeners find us!We want to hear from you! Share your thoughts about Terrestrials with us.Subscribe to our weekly newsletter for bite-sized essays, activities, and ways to connect with the show.Follow us on YouTube, Instagram, and TikTok for behind-the-scenes extras and more.Listen to original music from Terrestrials on Spotify, Apple Music, or our music page.Got a badgering question for the team? Email us at [email protected] or submit a voice memo with your name, age, and your question using this form!Terrestrials is made possible in part by listeners like you. Support the show by joining Radiolab’s membership program, The Lab—and we’ll send you a special thank-you gift from our team!

We’re doing a bunch of LIVE SHOWS at Little Island in NYC on August 6th-7th. For free. Come join! Check out all of our performances here.Today we’re bringing you an episode we taped LIVE at The Greene Space at WNYC. In a room filled with all types of critters — scorpions, hissing cockroaches, a tarantula named Isabel and our main star… the jumping spider. Entomologist and bug lover Dr. Sebastian Echeverri tells us all about his love for the jumping spider’s dance moves. Lulu and the audience learn about the creepy crawlies, pet them and then EAT a bug-filled snack.Special thanks to Dr. Sebastian Echeverri for all of his insect knowledge, musician Aviva Jaye for her beautiful harp composition, and Noor Shikari for preparing over 150 delicious grasshopper tacos for us. You can watch the full video taping of this episode here!Check out Dr. Echeverri’s spider field guide Spiders of the United States and Canada.If you ever find yourself in Brooklyn wanting to try some grasshopper tacos, check out Citrico on Washington Ave.  HEY GROWN-UPS!Love the show? Leave us a ⭐⭐⭐⭐⭐ rating and review on your podcast app—it helps curious listeners find us!We want to hear from you! Share your thoughts about Terrestrials with us.Subscribe to our weekly newsletter for bite-sized essays, activities, and ways to connect with the show.Follow us on YouTube, Instagram, and TikTok for behind-the-scenes extras and more.Listen to original music from Terrestrials on Spotify, Apple Music, or our music page.Got a badgering question for the team? Email us at [email protected] or submit a voice memo with your name, age, and your question using this form!Terrestrials is made possible in part by listeners like you. Support the show by joining Radiolab’s membership program, The Lab—and we’ll send you a special thank-you gift from our team!

On the outskirts of the Nevada desert, a young dog named Hades jumped his fence and ran away from home. His family lost hope, until one night, they saw Hades on the news. For almost seven months, he had been sleeping, eating and howling with a pack of coyotes.We usually view coyotes as vicious, bloodthirsty beasts. But turns out, they can be pretty friendly. They form unlikely alliances with other animals all the time. They’re so flexible they can eat almost anything and live everywhere from open prairies to city streets, where they lurk unseen like urban ghosts. Conservation scientist Christine Willkinson, or scrappy naturalist, tells us why a coyote’s scrappiness is its greatest superpower. In a world that rewards specialists, coyotes make a case for generalists - the ones not spectacular at any one thing, but just okay at everything. Plus, to find these ghosts in her own city, Lulu goes on an urban coyote hunt.Learn more about coyote friendships:Watch a video of a coyote eagerly waiting for its badger friend under a busy highway in the Santa Cruz mountains. (2020)Watch this video of a raccoon and coyote becoming best friends.Read about coyotes and ravens teaming up.Watch a coyote and bobcat befriending each other in Florida. (2015)Watch this unlikely friendship between a coyote and a cat. (Australia, 2019)Terrestrials was created by Lulu Miller with WNYC Studios. This episode was produced by Ana González, Alan Goffinski, Mira Burt-Wintonick, Joe Plourde, Lulu Miller, and Sarah Sandbach, with help from Tanya Chawla and Natalia Ramirez. Fact checking was by Natalie Middleton. Our advisors this season are Ana Luz Porzecanski, Anil Lewis, Dominique Shabazz, and Liza Demby.Support for Terrestrials also comes from the Simons Foundation, the Arthur Vining Davis Foundations, and the John Templeton Foundation. HEY GROWN-UPS!Love the show? Leave us a ⭐⭐⭐⭐⭐ rating and review on your podcast app—it helps curious listeners find us!We want to hear from you! Share your thoughts about Terrestrials with us.Subscribe to our weekly newsletter for bite-sized essays, activities, and ways to connect with the show.Follow us on YouTube, Instagram, and TikTok for behind-the-scenes extras and more.Listen to original music from Terrestrials on Spotify, Apple Music, or our music page.Got a badgering question for the team? Email us at [email protected] or submit a voice memo with your name, age, and your question using this form!Terrestrials is made possible in part by listeners like you. Support the show by joining Radiolab’s membership program, The Lab—and we’ll send you a special thank-you gift from our team!

Coquí frogs are synonymous with Puerto Rican identity. Residents of the island doze off to the high-pitched calls of coquís from dusk to dawn. There are even playlists of hours of coquí calls that lull listeners to sleep. That’s why ProducerBud Ana, a proud Puerto Rican, was confused when she saw a poster calling for the eradication of coquí frogs at a Hawaiian airport. Turns out, residents of Hawaiʻi see coquís as a nuisance, disrupting not only their sleep but their precious ecosystems. Listen as Ana explores how different islands can view these frogs so differently, and how, despite all of our human efforts, they won’t stop singing. Special thanks to evolutionary biologist Ana Longo and professor Noelani Puniwai for telling us about coquí frogs.Watch a coquí frog perform its call.Listen to Puerto Rican sleep sounds. Terrestrials was created by Lulu Miller with WNYC Studios. This episode was produced by Ana González, Alan Goffinski, Mira Burt-Wintonick, Joe Plourde, Lulu Miller, and Sarah Sandbach, with help from Tanya Chawla and Natalia Ramirez. Fact checking was by Anna Pujol-Mazzini. Our advisors this season are Ana Luz Porzecanski, Anil Lewis, Dominique Shabazz, and Liza Demby.Support for Terrestrials also comes from the Simons Foundation, the Arthur Vining Davis Foundations, and the John Templeton Foundation. HEY GROWN-UPS!Love the show? Leave us a ⭐⭐⭐⭐⭐ rating and review on your podcast app—it helps curious listeners find us!We want to hear from you! Share your thoughts about Terrestrials with us.Subscribe to our weekly newsletter for bite-sized essays, activities, and ways to connect with the show.Follow us on YouTube, Instagram, and TikTok for behind-the-scenes extras and more.Listen to original music from Terrestrials on Spotify, Apple Music, or our music page.Got a badgering question for the team? Email us at [email protected] or submit a voice memo with your name, age, and your question using this form!Terrestrials is made possible in part by listeners like you. Support the show by joining Radiolab’s membership program, The Lab—and we’ll send you a special thank-you gift from our team!