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PODCAST

But Why: A Podcast for Curious Kids

But Why is a show led by kids. They ask the questions and we find the answers. It’s a big interesting world out there. On But Why, we tackle topics large and small, about nature, words, even the end of the world. Know a kid with a question? Record it with a smartphone. Be sure to include your kid"s first name, age, and town and send the recording to questions@butwhykids.org!

kids & family

All Episodes

26:01

When did volcanoes start existing?

But Why: A Podcast for Curious Kids ·

2025/09/19

Volcanoes have been erupting on Earth for BILLIONS of years, and they’re still creating new landscapes today! Volcanoes can seem mysterious and scary, but people all over the world have learned to live in close proximity to active volcanoes. Today we answer questions you’ve sent us about how they form, how they erupt, what magma/lava is, and how volcanologists work to predict when they might erupt. Our guest is Freysteinn Sigmundsson, a volcanologist and professor at the University of

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27:09

How are glaciers formed?

But Why: A Podcast for Curious Kids ·

2025/09/05

But Why went somewhere really cool - literally - and we’re taking you along! We visited Sólheimajökull, a glacier in southern Iceland and then talked with University of Iceland glaciologist Guðfinna Aðalgeirsdóttir to discover how glaciers are formed, why they can be different colors, and how they shape the land. (Do you know the difference between a V-shaped valley and a U-shaped valley? Glaciers!) Plus we’ll talk a little bit about why glaciers around the world are retreating at such a fast

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13:49

How does wildfire smoke travel so far?

But Why: A Podcast for Curious Kids ·

2025/08/29

Have you noticed especially hazy skies where you live over the last few summers? While many parts of the world are experiencing more frequent and intense wildfires, even places that are nowhere near the fires are being impacted by the smoke from fires hundreds or thousands of miles away. Wildfire smoke gets so high in the atmosphere, it can be blown across a continent in a matter of days. In this special bonus episode, we’re going to learn the how and why of wildfire smoke that drifts around the

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39:34

Why are puffins' beaks so colorful?

But Why: A Podcast for Curious Kids ·

2025/08/22

Have you ever seen a puffin? With their bright beaks, orange feet and black and white coloring, these birds are very cool to look at. And we’ve gotten a lot of questions about them! In this episode, we talk with Don Lyons, an educator and avian ecologist with the Seabird Institute in Maine. What are puffins? Why are puffin beaks so colorful? Why do puffins dig burrows? How do puffins learn to fly? How can you tell if a puffin is male or female? How long can puffins hold their breath? Why do they

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34:30

Who invented the English language?

But Why: A Podcast for Curious Kids ·

2025/08/08

Where did the English language come from? Why do words have silent letters? Why do some people have accents? Why do some words sound similar? Answers to all of your questions about English and words with sociolinguist Erica Brozovsky, host of a PBS digital show called Otherwords. Download our learning guides: PDF | Google Slide | Transcript

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14:02

Chameleons, jellyfish and ballerinas! Check out But...

But Why: A Podcast for Curious Kids ·

2025/07/25

For today’s episode, we’re doing something a little different! We’re going to be listening to our video series, But Why Bites! (Even without the video part, they’re really cool!) Every other week over on our YouTube channel, we answer one kid question in a short and sweet little video. You can find all of them at the But Why Kids channel while you enjoy this compilation of episodes that we’re calling a Big Bite.

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29:10

Who created math problems?

But Why: A Podcast for Curious Kids ·

2025/07/11

Who created math problems? Why does one plus one equal 2 and not 11? Why do numbers go on forever? Why are numbers for counting? Why do you need math?If you love math, this is the episode for you. And if you hate math…this is the episode for you! We’re answering all kinds of questions and demystifying the science and beauty of the discipline of mathematics with Dr. Melania Alvarez, outreach coordinator for the Department of Mathematics at the University of British Columbia in Canada. She’s also

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28:28

Why do some people like spicy food?

But Why: A Podcast for Curious Kids ·

2025/06/27

Ever wondered why some spices burn your throat while others tickle your nose? Or why some of us live for spicy foods while others sweat at the mere thought of a habanero? How do pickles stay crunchy if they’re sitting in brine for weeks on end? And why do we have such different food preferences from our friends? We’re answering your food questions with chef and author Kenji López-Alt, author of the kids book Every Night is Pizza Night and co-host of The Recipe.Download our learning guides: PDF |

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22:15

Why do we need to use sunscreen?

But Why: A Podcast for Curious Kids ·

2025/06/13

It’s summer and that means slathering yourself with sunblock before you’re allowed to go run around outside. Not everyone loves that ritual: sunscreen can be cold or sticky. Sometimes it gets in your eyes, and it always feels like it’s time to reapply JUST as you’re about to jump in the water or go kick the ball. So, what’s the deal? Is it really all that important? We get the scoop from Dr. Jeff Yu, a pediatric dermatologist at Massachusetts General Hospital. He’ll help us understand: What is a

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34:11

Are horseshoe crabs…crabs?

But Why: A Podcast for Curious Kids ·

2025/05/30

How did horseshoe crabs get their names? Are they even crabs? And did they really exist before the dinosaurs? Early spring presents a unique opportunity to see these living fossils up close as they scuttle up to the shoreline along the Atlantic coast of the United States to mate and spawn. But Why traveled to Cape Cod to see horseshoe crabs up close. There we met up with horseshoe crab expert Sara Grady, who works for Mass Audubon. We learn all about these arthropods and answer questions like: Can

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21:14

Who invented emoji?

But Why: A Podcast for Curious Kids ·

2025/05/16

Emoji are those little images you can send in text messages to friends and family. Nine-year-old Leila in New Jersey wants to know how they were invented. So in this episode we find out with Jane Solomon, editor at Emojipedia and Paul Galloway of the Museum of Modern Art in New York. We learn what the first emoji looked like, way back in the dark ages of the 1990s and we explore how emoji may be a new trend, but communicating through pictures is a very old tradition. Plus, are emoji…art? Give this

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10:51

Why do walruses look so weird?

But Why: A Podcast for Curious Kids ·

2025/05/09

Why do walrus look the way they do? Why do they have such long tusks? Do they have other teeth? Do walruses migrate? We learn all about these majestic giants with Adam Ratner of the Marine Mammal Center in Sausalito, California.Download our learning guides: PDF | Google Slide | Transcript

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28:44

What’s a seal? What’s a sea lion?

But Why: A Podcast for Curious Kids ·

2025/05/02

What’s the difference between seals and sea lions? Do seals bark? Are they gray? Do harbor seals live in snowy regions? Why do sea lions eat fish? Why do sea lions fight each other? Seals and sea lions are pinnipeds, fin-footed marine mammals, and we’re learning all about them today with a visit to the Marine Mammal Center in Sausalito, California, where marine biologist Adam Ratner answers all your pinniped questions!Download our learning guides: PDF | Google Slide | TranscriptYou can watch the sea

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28:43

Do atoms never touch?

But Why: A Podcast for Curious Kids ·

2025/04/18

What are atoms made of? Why is everything made of atoms? Why are atoms so small? How many atoms are there in the world? How did scientists find atoms if we can’t see them? How do atoms get their color? We learn about atoms with Dr. Ben Still, author of “Particle Physics Brick by Brick” and “The Secret Life of the Periodic Table.” His new book, “How the Universe Works,” will be released in September.Download our learning guides: PDF | Google Slide | TranscriptFurther reading:Cosmic History - NASAThe

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23:58

How are records made?

But Why: A Podcast for Curious Kids ·

2025/04/04

How are records made? How does a record player make sound? Why are we still listening to and buying records when there are so many digital ways to listen to music?! But Why visits Gold Rush Vinyl in Austin, Texas to learn how little plastic beads become brightly colored records that can play back your favorite music or sounds. Download our learning guides: PDF | Google Slide | Transcript

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25:39

Who invented tacos?

But Why: A Podcast for Curious Kids ·

2025/03/21

Do you love tacos? Then you’re not alone! Tacos originated in Mexico but they’re popular worldwide and they are ever evolving. Kids have a lot of questions about this favorite food so we visited Nixta Taqueria in Austin, Texas to learn more! Who made the first tacos? And where? What’s the deal with crispy shells vs. soft tortillas? Why do tacos have sauce? Why does corn come in so many different colors? And are there rules about what makes a taco…a taco? Download our learning guides: PDF | Google

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31:03

What are taxes and tariffs?

But Why: A Podcast for Curious Kids ·

2025/03/07

No matter how old you are, you’re part of the economy, but it can be tricky to understand what the economy actually is. Plus, what are taxes? What’s inflation? What are tariffs and why have they been in the news so much in 2025? In this episode, we break down economic terms and concepts with business reporter Stacey Vanek Smith.Download our learning guides: PDF | Google Slide | Transcript

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34:15

Are tapeworms sticky?

But Why: A Podcast for Curious Kids ·

2025/02/21

Fleas, lice, tapeworms and ticks - these are all examples of parasites, living organisms that live on or in a host species and need this other organism to complete their complex life cycles. Sounds bad, but parasites are essential to a healthy ecosystem! And our guest for this episode says they’re also fascinating and even beautiful. Parasite ecologist Chelsea L. Wood, author of Power to the Parasites, tackles all your parasitic questions in this episode! They include: Why are there worms in our

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20:59

Why do trains run on tracks?

But Why: A Podcast for Curious Kids ·

2025/02/07

How do trains work? We went to Union Station in Washington, DC to answer a whole wagonload of questions with Amtrak's Patrick Kidd.A few years ago, we left our studio in Vermont to hop on the Amtrak Acela train that runs multiple trips per day between Washington, DC, New York City and Boston. But don't worry; we got off before the train departed! It was so much fun, we wanted to bring you that journey again!Questions we're answering in this episode: How do trains work? What about electric trains

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27:32

How do you whistle?

But Why: A Podcast for Curious Kids ·

2025/01/24

How do people whistle? How does whistling make a sound? Why does your tongue change a whistle higher or lower? Can you get a trophy for whistling? Can people with laryngitis whistle? Get ready, we learn all about whistling with musician and champion whistler Emily Eagen and musician Yuki Takeda. And who whistles our theme song? We'll hear from musician Luke Reynolds, and a kid whistling chorus from our listeners!Download our learning guides: PDF | Google Slide | Transcript

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272 results

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