Where does the sky end?

Why is there traffic? How do traffic lights work? How do they know when to turn red and green? Why does green mean go and red mean stop? Why are cars able to go faster than they are allowed to go with the speed limit? Why do we drive on the right side of the road in the United St ...  Show more

Can’t get enough of lizards? We’re back with a bonus episode answering more of your lizard questions with Adam Clause of the San Diego Natural History Museum. This week, chameleons, Komodo dragons, iguanas, monitor lizards and tuatara! How do chameleons change color? Why are Komo ...  Show more

This is a rebroadcast of one of our favorite episodes from Season 8! This was voted on by our patrons on Patreon--if you want to help us pick our next AND FINAL REBROADCAST OF THE SUMMER--just go to patreon.com/tumblepodcast and vote. You don't have to be a supporter to vote, but ...  Show more

We love to look at stars. But have you ever wondered just how big stars are? Listen to this fascinating chat with Dr. Gerard van Belle, Chief Scientist for the Navy Precision Optical Interferometer at Lowell Observatory and he is going to tell us about the cool technology they us ...  Show more

This week’s big questions!You’ve been sending in your curious questions, and this week… 💧 Jonah wants to know why we sweat.🤧 Raphael is wondering why we close our eyes when we sneeze.🐸 Robbie is curious about why frogs croak.🌕 Arla wonders why the Moon is called the Moon.⛽ An ...  Show more

Where in the world is the mysterious ninth planet? What in the world did early humans eat to make them so smart? How in the world does saying "thank you" make you healthier? Find out this week's who, what, where, when and how on Wow in the World Episode 1! See Privacy Policy at h ...  Show more