
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!
Latest episodes

8 snips
May 16, 2025 • 21min
Who invented emoji?
Join Paul Galloway, a collection specialist at MoMA and emoji author, as he chats about the colorful journey of emojis from their 1990s origins in Japan to becoming integral in modern messaging. Learn about how these tiny images enhance our communication, the intricacies of emoji coding, and the role of Emojipedia in deciphering their meanings. Plus, discover the creative process behind new emoji designs and whether they should be considered art!

May 9, 2025 • 11min
Why do walruses look so weird?
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

May 2, 2025 • 29min
What’s a seal? What’s a sea lion?
Adam Ratner, Director of Engagement Conservation at the Marine Mammal Center, reveals the intriguing world of seals and sea lions. He discusses how to differentiate between these pinnipeds, their unique sounds, and remarkable adaptations. Listeners learn about the rescue efforts for sick marine mammals and the fascinating lives of these creatures, including their feeding behaviors and conservation challenges. Ratner underscores their role as vital indicators of ocean health, highlighting the importance of conservation for species like the California sea lion.
Apr 18, 2025 • 29min
Do atoms never touch?
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.Check out Dr. Ben Still's YouTube channel to learn more about atomic, nuclear and particle physics.Download our learning guides: PDF | Google Slide | TranscriptFurther reading:Cosmic History - NASAThe Secret Science of AtomsDOE Explains...Nucleosynthesis | Department of Energy

6 snips
Apr 4, 2025 • 24min
How are records made?
Karen Kelleher, the Founder and CEO of Gold Rush Vinyl, shares her insights on the fascinating world of record production. She walks through the journey of transforming colorful PVC pellets into vibrant vinyl records. Kelleher explains why, despite digital music, vinyl remains beloved. The episode dives into the mechanics of record players and the artistry behind sound grooves. Additionally, Kelleher highlights how her company supports emerging artists, turning music dreams into reality while promoting creativity and sustainability.

8 snips
Mar 21, 2025 • 26min
Who invented tacos?
Join Edgar Rico, the talented chef and co-owner of Nixta Taqueria in Austin, as he tackles the delicious world of tacos! Discover the intriguing origins of this versatile dish and how it has evolved over time. Learn why corn is so vital to Mexican culture and the fascinating process of making fresh tortillas. Edgar shares insights on the art of taco making and even dives into the playful debate on whether tacos can be considered sandwiches. A delightful exploration for taco lovers of all ages!

12 snips
Mar 7, 2025 • 33min
What are taxes and tariffs?
Stacey Vanek-Smith, a seasoned business reporter and senior editor at Bloomberg News, simplifies the tricky world of economics for young minds. She unpacks key concepts like taxes, explaining how they fund essential services and distinctions like income and sales tax. Stacey also dives into tariffs, discussing their impact on trade and current U.S. relations with Canada and China. Listeners will learn how inflation affects prices and the surprising psychology behind pricing strategies, all while fostering a deeper understanding of the economy.

Feb 21, 2025 • 34min
Are tapeworms sticky?
In this engaging discussion, Chelsea L. Wood, a parasite ecologist and author of Power to the Parasites, unveils the hidden marvels of parasites like tapeworms and lice. She explains how these organisms, despite their negative reputation, play crucial roles in ecosystems. Chelsea highlights fascinating adaptations, such as the unique tentacles of tapeworms in shark guts and the lifecycle of head lice. Listeners learn about the ecological balance parasites maintain and why they are not just pesky but pivotal in nature.

Feb 7, 2025 • 21min
Why do trains run on tracks?
In this engaging exploration, Patrick Kidd, the Communications lead and in-house historian at Amtrak, shares fascinating insights into the world of trains. Listeners learn how trains operate and the evolution from steam engines to modern electric and bullet trains. Kidd explains why trains run on tracks and their impressive speed despite heavy weight. The discussion highlights Amtrak’s features and advantages of train travel over cars, wrapped up with a peek into the future of high-speed rail in the U.S.

9 snips
Jan 24, 2025 • 28min
How do you whistle?
Join musician and champion whistler Emily Eagen as she dives into the fascinating world of whistling. Discover how sound is created and why your tongue can change the pitch. Learn about the cultural significance of whistling, including its surprising role in languages like Silbo Gomero. Emily shares tips for beginners, emphasizing whistling as a joyful form of musical expression. Plus, hear about exciting competitions and the delightful story behind the podcast's theme song, all brought to life with audience participation!