Podcast Episodes
Back to SearchMailbag: 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 c…
2 months, 2 weeks ago
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 lite…
2 months, 4 weeks ago
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 th…
3 months, 1 week ago
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 t…
3 months, 3 weeks ago
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…
4 months, 1 week ago
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…
4 months, 3 weeks ago
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 no…
5 months, 1 week ago
Who Works Harder: Ants or Bees?
Season 11 Episode 10
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 bat…
5 months, 3 weeks ago
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 …
6 months ago
Do Trees Think?
Season 11 Episode 9
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 send…
6 months, 2 weeks ago