Happy holidays! This is a rebroadcast of our chilly Season 7 episode, The Great Seal Count. How do you count the... more

This is a rebroadcast of one of our favorite episodes from Season 8! When did smartness begin? We’ll find out how... more

This is a re-airing of our award-winning episode The Swift Quake! This episode won the AAAS Kavli Silver Medal Award... more

What does it feel like to be in space? That’s what Elijah wants to know. So we’re taking off on... more

Are cats evil? Are they hatching a plot to take over the world? Or are they just misunderstood? Scientist and... more

How do species evolve? Find out in the shocking conclusion of our Monkeyflower mystery series! Plant biologist David Lowry has... more

Why do plants grow in different places? How do they adapt to different environments? And what makes them different species?... more

Ever wondered how dinosaurs left their footprints behind millions of years ago? We embark on a prehistoric adventure with renowned... more

What do you call a scientist who studies poop? A poopologist! We’re exploring the stinky science of “poopology” at the... more

“Do dogs think and feel the way we do?” We all know dogs can’t talk. That’s why scientists have to... more

This is a rebroadcast of one of our favorite episodes from the past. Do bugs have elbows? That’s what Clare... more

This is a rebroadcast of one of our favorite episodes from Season 8! This was voted on by our patrons... more

This is an encore episode, picked by our Patreon supporters. If you want to go vote for our next encore,... more

Happy Halloween! We’re headed to Candy Land, a sugary laboratory where mathematicians found a mysterious candy dagger appear - over... more

This is an encore of one of our favorite episodes from Season 5! If you'd like to help us choose... more

This is a summer encore episode of one of our favorite episodes from Season 4 of Tumble! Do you love fossils,... more

Is it possible to build a time machine? Can we time travel someday? That’s what Tumble listener Willa wants to... more

How do scientists find out if an asteroid might hit our planet? And what do they do if it’s on... more

How did cicadas evolve to go underground for so long? Why do cicadas spend so much of their lives underground?... more

Scientists stage an alien abduction to learn how bacteria avoid antibiotics, in this fact-meets-fiction episode! Meet our alien bacteria invaders... more