Tumble Science Podcast for Kids

Mailbag: What Happens When Galaxies Crash?

In this mailbag episode, astronomer Karen Masters joins Marshall and Lindsay to answer a listener's question: what happens when Andromeda crashes into the Milky Way? Plus

Why Does Earth Have a Magnetic Field?

How did Earth get its magnetic field? And why does it move around? Our listeners have questions about one of Earth’s most mysterious forces. To find out, we go on an arch

Mailbag: Do Space Wormholes Exist?

In this mailbag episode, Marshall and Lindsay tackle two listener questions — whether space wormholes are real, and what a fly wing and a carrot could possibly have in co

Why Do T. Rexes Have Small Arms?

Why did T. Rex have such tiny arms? That’s what our listener Nora wants to know. We’re going to find out why the biggest, most powerful predator to ever walk the Earth di

Mailbag: Why Does the Left Brain Control the Right Side of Your Body? Are Dinosaurs Reptiles or Birds?

In this final mailbag episode of Summer 2026, Marshall and Lindsay address two listener questions, and learn about a surprising twist of evolution. Plus, listener reviews

Tumble Science Podcast for Kids Season 12 Starts September 11!

Why do T. Rexes have tiny arms? Can dogs actually talk? Do we remember dreams or nightmares more? Season 12 of Tumble Science Podcast for Kids drops September 11th — and

The Science of Your Favorite Foods [ENCORE]

This is a rebroadcast of a favorite episode of Tumble from season 6. What’s your favorite food? Why does it taste so good? It turns out, what we think is tasty isn’t ju

Mailbag: How Do Stem Cells Decide What to Become? What's Morse Code?

In this special summer mailbag episode, Marshall and Lindsay help answer three kid questions: How do stem cells decide what to become? How do chameleons change color?

The Secret to Cheetah's Super Speed [Encore]

How do cheetahs get their super speed? We talk to a cheetah scientist to find out why a spotted cat is the fastest animal on Earth. Cheetahs are literally built for speed

The Plastic Pollution Patrol [ENCORE]

This is a rebroadcast of one of our favorite episodes from last season, and one that is particularly timely for the summer! What if you found out that there was a tiny,

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

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 co

How Were Dinosaur Tracks Made?

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 pre

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

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 c

Pluto and the Planetary Pandemonium - Encore

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

Who Works Harder: Ants or Bees?

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 industriousnes

Mailbag: Are Animals Ticklish? + New Song!

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 Leaven

Do Trees Think?

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

What's Dark Matter?

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 ma

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

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

Can Axolotls Teach Us to Grow New Hands?

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 liste