Tumble Science Podcast for Kids

Latest Episodes:

Mailbag: What would happen if the Moon disappeared? How big is the universe, really? Are there atoms in a black hole? Jun 26, 2026

Show notes

What would happen if the Moon disappeared? How big is the universe, really? And what happens to atoms inside a black hole? Marshall and Lindsay get the answers to some cosmic questions in this special mailbag episode!

If you want to have your comment or review read on our show, leave one! Write a review on ⁠⁠Apple Podcasts⁠⁠ or comment on ⁠⁠Spotify⁠⁠.

Join on Patreon to help us continue to make Tumble and be featured on future episodes, and help us decide on Season 12 topics: ⁠⁠patreon.com/tumblepodcast⁠⁠

Shop official Tumble merch: ⁠⁠https://tumblepodcast.dashery.com/⁠⁠

Submit a science question: ⁠⁠https://www.sciencepodcastforkids.com/contact

Watch the Joke-ha-thon here!

Other Tumble episodes mentioned in this mailbag:

"What Would Happen If There Was No Moon?" (in Spanish).

"The Quest for the Edge of the Universe with Katie Mack"

"How Big is the Universe?"

Cataloging the Universe - Audio Course

How Were Dinosaur Tracks Made? Jun 12, 2026

Show notes

This is a rebroadcast of one of our favorite episodes from season 10!

Ever wondered how dinosaurs left their footprints behind millions of years ago? We embark on a prehistoric adventure with renowned paleontologist Paul Olsen! Discover the secrets behind dinosaur tracks and how these ancient prints can tell us incredible stories about the lives of dinosaurs. From the science of fossilization to what these footprints reveal about dinosaur behavior and habitats, Paul Olsen will guide us through the fascinating world of these mysteries left in stone - and share how he discovered thousands of dino tracks when he was just a kid.

Join us on a Dino Map Adventure at ⁠nepm.org/dinomap⁠! We’ve created a free audio tour to explore the science and history of dinosaur tracks in the Pioneer Valley of Massachusetts. Lindsay and Marshall will guide you through the place where dinosaur footprints were first discovered - and put you on the path to becoming dino track explorers! Dinosaur Adventures in the Pioneer Valley are supported by The Bement School, The Center School, and HCS Headstart.

If you like this episode, consider supporting Tumble on Patreon by going to patreon.com/tumblepodcast. Get ad-free episodes for just $1 a month!

Mailbag: Could a Peacock and Platypus Be Friends? Why does the ground keep spinning? Do magnets work in space? May 29, 2026

Show notes

You asked, we answered! In this mailbag episode, we're tackling three big kid questions: why does the ground keep spinning after you stop? Do magnets work in space? And could a peacock and a platypus ever be BFFs? We get answers from real experts, as well as reading your reviews and comments!

Also, the Joke-ha-thon is coming up on June 3rd! Go here to donate and pick your champion, and also win some amazing, amazing prizes for yourself and your school.

If you want to have your comment or review read on our show, leave one! Write a review on ⁠Apple Podcasts⁠ or comment on ⁠Spotify⁠.

Join on Patreon to help us continue to make Tumble and be featured on future episodes, and help us decide on Season 12 topics: ⁠patreon.com/tumblepodcast⁠

Shop official Tumble merch: ⁠https://tumblepodcast.dashery.com/⁠

Submit a science question: ⁠https://www.sciencepodcastforkids.com/contact⁠

Pluto and the Planetary Pandemonium - Encore May 15, 2026

Show notes

This is a rebroadcast of one of our favorite episodes from the past!

It’s a scientific controversy of planetary proportions! Is Pluto a planet, or not? You decide, after we present two sides of an epic astronomy argument. Back in 2006, the International Astronomer’s Union voted on a definition of the word “planet” that excluded Pluto and other newly dubbed “dwarf planets” from planethood status. Astronomers - and everybody else - quickly chose sides. We dive deep into the debate and learn that Pluto’s not the only Space Object Formerly Known As A Planet. Then we’ll ask you to weigh in with your opinion, and see if you can find “consensus” on what should be called a planet. Featuring planetary astronomer Kirby Runyon. We have a present for your birthday!! We’ll be doing birthday shoutouts for our Patreon members, beginning next month. Want to hear a message on the podcast just for your special day? Pledge at the $5 level at patreon.com/tumblepodcast. You’ll be helping us make the show, and we also have extra audio goodies for you. Hear more from our interviews with scientists! For this episode, Kirby Runyon expands on the different types of planets, and the fascinating features you can find on each one. There’s more about planets, on our website at sciencepodcastforkids.com. Don’t forget to subscribe to Tumble and tell your friends!

See the new "Eight Planets in the Solar System" video here.

Who Works Harder: Ants or Bees? May 01, 2026

Show notes

Both ants and bees work hard. So which one works harder? That’s what our listener Hadi wants to know! So we’re pitting insect against insect in a battle of industriousness. Ants or bees: Who will win?! Tune in as we attempt to crown the Hardest Working Insect!

To help, we’ve recruited Dr. Sammy Ramsey, an entomologist, National Geographic Explorer, and host and producer of the Disney+ documentary, “Secrets of the Bees.” In a series of very competitive rounds, Dr. Sammy shares the research to stack up the habits of ants and bees. Plus, Tumble Patreon members weigh in with who THEY think should win!

When you’re done listening, tell us if you agree with the results! Write a review on Apple Podcasts or comment on Spotify.

Join on Patreon to help us continue to make Tumble and be featured on future episodes, and help us decide on Season 12 topics: patreon.com/tumblepodcast

Shop official Tumble merch: https://tumblepodcast.dashery.com/

Submit a science question: https://www.sciencepodcastforkids.com/contact
Also go donate to our Joke-ha-thon fundraiser by May 27th at 9 am ET to enter a drawing for AMAZING prizes! https://tumble.science/joke2026

Mailbag: Are Animals Ticklish? + New Song! Apr 17, 2026

Show notes

A special “tickle attack” Mailbag edition of Tumble! We’re tackling your questions about whether animals can be tickled, and why we laugh when we’re tickled. David Leavens, a professor of psychology, helps us break down the not-so-silly science of tickling. Plus, a brand NEW SONG from Marshall based on a listener request!

Want to be on a future mailbag episode? With an adult, leave a review on Apple Podcasts, a comment on Spotify, or email us at tumblepodcast@gmail.com!

Join on Patreon to help us continue to make Tumble: patreon.com/tumblepodcast

Shop official Tumble merch: https://tumblepodcast.dashery.com/

Listen to Tumble en Español: https://pod.link/1521514886
Submit a science question: https://www.sciencepodcastforkids.com/contact

Do Trees Think? Apr 03, 2026

Show notes

Do trees think? That’s what our listener Alden wants to know. He has an idea that scientists might study mushroom roots to find out if trees are sending messages. Is that true? And if so, what do trees have to say?!We travel deep into the forest with a young soil scientist named Natalia Mondi from the Mother Tree Project, to find out how and why trees communicate through the ecosystem. Along the way, we’ll discover what trees are asking for, how their “forest buds” help them out, and how Natalia is using this knowledge to restore a forest in Canada, guided by the Kwiakah Nation.

Join on Patreon to help us continue to make Tumble: patreon.com/tumblepodcast

Shop official Tumble merch: https://tumblepodcast.dashery.com/

Listen to Tumble en Español: https://pod.link/1521514886

Submit a science question: https://www.sciencepodcastforkids.com/contact

https://tumble.science/JokeContestant

What's Dark Matter? Mar 20, 2026

Show notes

What is dark matter? Why do scientists think it exists? How are they searching for it, and why are they doing it in an underground lab?! Join us on the search for dark matter with Alvaro Chavarria, a physicist running a dark matter detector underneath a mountain in the French Alps. We’ll take you inside the lab to visit the detector, and find out why everything we think we know about dark matter… could be wrong.

For more, visit our website!

Our question comes from Jeronimo, a Tumble en Español listener! To listen to Tumble en Español, use this link to subscribe wherever you get your podcasts: https://pod.link/1521514886

Join on Patreon to help us continue to make Tumble: patreon.com/tumblepodcast

Shop official Tumble merch: https://tumblepodcast.dashery.com/

Submit a science question: https://www.sciencepodcastforkids.com/contact

Shhh! This link is TOP SECRET: https://tumble.science/JokeContestant

Who Invented the Peanut Butter & Jelly Sandwich? (with The Past and the Curious) Mar 06, 2026

Show notes

Who invented the peanut butter and jelly sandwich? And how did it become one of the most famous lunches in America?

In this episode, a question from listener Leila sends us on a trip through history to find out how peanut butter, jelly, and sliced bread came together to make the classic PB&J. Along the way, we learn about the first written recipe for the sandwich in 1901, how peanut butter went from a fancy food to a lunchbox staple, and why sliced bread changed everything.

To help answer Leila’s question, we turned to our buddy Mick Sullivan, host of the history podcast The Past and the Curious. Mick loved the question so much that he made a whole episode about it—and today we’re sharing it with you.

Join on Patreon to help us continue to make Tumble: ⁠patreon.com/tumblepodcast⁠

Shop official Tumble merch: ⁠https://tumblepodcast.dashery.com/⁠
Listen to Tumble en Español: ⁠https://pod.link/1521514886⁠
Submit a science question: https://www.sciencepodcastforkids.com/contact

Can Axolotls Teach Us to Grow New Hands? Feb 20, 2026

Show notes

Why do humans usually have five fingers on each hand? And what if one day, we could grow a new finger if we lost one?

In this episode, a question from six-year-old listener Ayla sends us on a journey from tiny developing embryos to one of the most amazing animals on Earth: the axolotl.

We talk with Dr. Jessica Whited, a Harvard-based biologist who studies how axolotls regrow their limbs - and why humans can’t do the same… for now! Along the way, we discover how our hands develop before we’re born, why evolution settled on five fingers, and axolotls might show us the way to regrow our own limbs.

Plus: why axolotls have to live in separate tanks (hint: they’re a little too snack-happy).

Join on Patreon to help us continue to make Tumble: patreon.com/tumblepodcast

Shop official Tumble merch: https://tumblepodcast.dashery.com/

Listen to Tumble en Español: https://pod.link/1521514886

Submit a science question: https://www.sciencepodcastforkids.com/contact