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!
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Bad Seeds
The biggest black market you’ve never heard of is blooming right under your nose. Whether it’s a 4,000-pound cactus shoveled from the Arizona desert or delicate orchids pinched from the tangled jungle of Peru, rare plants are at the center of a rapidly growing and lucrative world of crime. Hosted by plant expert Summer Rayne Oakes, Bad Seeds plunges straight into it, featuring the buyers, the sellers, the obsessives, and those who came face-to-face with the criminals behind an underworld few know exist.

A Ciencia Cierta
Programa de ciencia dirigido y presentado por Antonio Rivera.
Introducing ChopChop: Let's Get Corny!
A new food-focused kids podcast is here. It’s called ChopChop and it’s part of a non-profit committed to getting kids and families to cook and eat meals together. Explore tasty recipes on their website! They also publish a quarterly magazine in English and Spanish (a good way to practice a second language). We contributed to their very first episode and we have to say, it’s the corniest episode you’re ever going to listen to! Our contribution was the science of how popcorn pops. We hope you gain some kernels of knowledge from this episode! We had an ear full.
How do broken bones heal?
Why do we have bones? How do they grow–and how do they know when to stop growing? How many do we have in our bodies? And when we break our bones, how do they heal? What do casts do? And how do you know if you’ve broken a bone? Broken bones are a common occurrence in kids. Up to 40% of girls and up to 50% of boys will break a bone in their lifetime. In this episode, we learn about the role of bones in our body and how to deal with a fractured bone with Melissa Raddatz, a family nurse practitioner at Duke Health System in North Carolina. The first part of this episode is all about bones in general, and we shift to broken bones for the second half.Download our learning guides: PDF | Google Slide
How do wind turbines work?
How do wind turbines work? How are wind turbines made? What will our energy picture look like in the future? We’re taking a deep dive into wind power, and trying to make the technology understandable, with Josh Castonguay of Vermont utility Green Mountain Power. Download our learning guides: PDF | Google Slide | Transcript
Do earthworms have eyes?
Come along to learn all about the wriggling worms that live in the dirt beneath your feet. Earthworms are everywhere, and there are many species of worms yet to be discovered. How do worms communicate? Why do worms have slime? Why do worms come out when it rains? Answers to all of your worm questions with earthworm detective Sam James. Plus, we learn about worm composting with a kid who’s in charge of her family’s food scraps! Download our learning guides: PDF | Google Slides
How do we learn to swim?
But it’s important to know how to swim if you’re going to be around water! In this episode, Upper Valley Aquatic Center Swim School Director Kana Wyman gives us swimming tips, like how to get comfortable putting our heads in the water, how to float and more.Download our learning guides: PDF | Google Slides | TranscriptA few tips for getting started: If you don’t live near a pool or body of water, you can learn some primary skills even in a bathtub or using a bucket. Get used to putting your face in the water by using a bucket or big bowl. Keep your mouth closed and blow air through your nose. Humming can help make sure you’re breathing out. When floating, think about a string pulling your belly button up to the sky. It’s easier to float if you spread your body out, rather than curling into a ball. You may need to swirl your arms or legs to keep your whole body on top of the water. Some people have a harder time floating than others, due to body mass differences. So if it feels hard, it’s not your fault! Check with community swimming pools to see if they offer free lessons. Many pools, gyms or swim schools will offer lessons for kids and adults that are free or subsidized, at least occasionally, to make sure everyone has the opportunity to learn lifesaving swimming skills.
What’s it like to compete in the Olympics?
We’re celebrating the Olympics and Olympic athletes with an episode chock full of the interviews we’ve done with Olympians. Plus we answer some of the Olympic-themed questions you’ve sent us, starting with: what’s all the hype about winning a big piece of metal? And are those medals really made out of gold, silver and bronze? And we speak with Paralympian Emelia Perry, who’s competing in the paratriathlon in Paris! (Other athletes we hear from: skier Andrew Weibrecht, bobsledder Elana Meyers Taylor, and mountain biker Lea Davison.)Download our learning guides: PDF| Google Slide | Transcript
Why do we wear clothes?
Have you ever been threading one leg through a pair of pants in the morning and wondered…why do we wear clothes anyway? Or wondered why pockets in clothing designed for girls are sometimes smaller than the pockets in clothing designed for boys? In this episode we tackle questions about clothes with fashion historian and writer Amber Butchart.Download our learning guides: PDF | Google Slides | Transcript
Who invented pizza?
How is pizza dough made? How does gluten-free dough rise? Who invented pizza? Is there pizza in every country? Is yeast alive?! Kids love pizza and they have questions! We get answers from Frank Pinello of Best Pizza in Williamsburg and Scott Wiener of Scott’s Pizza Tours. Download our learning guides: PDF | Google Slide | Transcript
Why do oranges have peels?
Why do oranges have peels? Why is the inside of an orange segmented? Why are lemons and limes so sour? Why do lemons have seeds but limes don’t? Why does fruit have juice? How many oranges are in a gallon of juice? How do seedless oranges reproduce? How are oranges available year-round? Why are the fruit and the color both called orange? We’re answering questions about citrus with Fernando Alferez from the University of Florida’s Southwest Florida Research and Education Center. Download our learning guides: PDF | Google Drive | Transcript
Do people eat bugs?
Yes! In many parts of the world, insects are a regular part of people’s diets. Bugs are an efficient source of protein, and many cultures find them delicious. Some countries, like the US, don’t have a strong culture of insect cuisine, but that’s starting to change as people look for ways to feed a growing global population without using as many resources as we currently do. So insects might be an important part of our future diets as well. With all the talk about cicadas this summer, eating bugs has been making news for adults. So, in this bonus episode, But Why learns about cooking up insects with Joseph Yoon, edible insect ambassador at Brooklyn Bugs. Download transcript
Why do cicadas come out every 17 years?
This spring, trillions of periodical cicadas are emerging from the ground, where they’ve spent 13 or 17 years feeding on xylem (basically, tree juice). The two specific broods emerging this year have not come out at the same time since 1803, and kids may be hearing a lot of news about these loud insects. So today we’re tackling the cicada questions you’ve sent us: Why do cicadas come out every 17 years? What do cicadas eat? Why are there more cicadas at night than in the morning? Why do cicadas molt? How do cicadas get babies? We speak with Dan Gruner, professor of entomology at the University of Maryland, to get answers.Download our learning guides: PDF | Google Slide | Transcript
Where does the sky end?
Where is the border between sky and space? That's what 5-year-old Matthias of Durham, New Hampshire wants to know. Alesandra, 3 of Bella Vista, Arkansas wants to know why we can't hold air. In this episode from 2020, we’re joined by anthropologist Hugh Raffles, a professor at The New School, and by astronomer John O'Meara, chief scientist at the Keck Observatory. And we have special scoring by cellist Zoë Keating.Download our learning guides: PDF | Google Slide | Transcript
Why are cockroaches so yucky?
That’s a question a lot of people have, honestly. But a kid named Rosie was bold enough to ask us to investigate why. So, in the latest episode, we dig in on why cockroaches get such a bad rap and why you might want to reconsider if you’re not a fan. Only two percent of the world’s cockroaches are considered pests. Those are the ones that can live in houses and potentially make us sick. But the vast majority of cockroaches don’t bother humans at all! Some, like the social cockroach species known as termites, work to decompose organic material and are hugely important to our environment. So where do people learn negative attitudes toward insects? We dig deep into insects with Jessica Ware, an entomologist and curator at the American Museum of Natural History. She’s also the host of the PBS digital series Insectarium. Answers to your questions about cockroaches, termites, dragonflies, praying mantises and more! Download our learning guides: PDF | Google Slide
How do crocodiles chomp?
Why do lizards have scales? Why are reptiles cold-blooded? Why do lizards have long tongues? How do lizards grow their tails back? Are crocodiles dinosaurs? What’s the difference between an alligator and a crocodile? Why do crocodile eyes look like they have mirrors in the back? How do crocodiles chomp? Why do crocodile teeth stay sharp? Why are crocodiles green? Why do crocodiles swim? Answers to all of your crocodile and alligator questions with Venetia Briggs-Gonzalez, one of the researchers known as the Croc Docs at the University of Florida. Download our learning guides: PDF | Google Slide | Transcript
Why do ballerinas wear ballet shoes?
Why do people dance? Where did ballet come from? How do you make pointe shoes for ballet? How does practice make you better at things? But Why visited Dance Theatre of Harlem to get answers to these questions with company artists Derek Brockington and Lindsey Donnell. Download our learning guides: Transcript