Have you ever wondered how bridges are built? How do engineers know what materials to use? Listen to this enthusiastic and fascinating chat with Bridge Engineer Danielle Schroeder as she takes us behind the scenes and teaches us about how structures stand up. Don't forget to do the awesome challenge!

Do you love going to the zoo? Want a behind-the-scenes peek into how zookeepers keep their animals safe and happy? Listen to this fascinating episode with Zookeeper Susan Summers as she tells us what it's like to take care of some amazing animals!

Ever wish you could discover a fossil? Listen to this exciting episode with paleontologist and science cosplay educator Gabriel-Philip Santos who works with the ALF Museum in CA. He shares with us his studies of some amazing fossilized marine animals and they ended up on dry land! (There are even some sci-fi references to explain the science here)

Teeth are some of the hardest substances in the body, so why do they break down? Listen to this FUN chat with dentist, Dr. Emily Swanson as she explain to us WHY teeth decay. You just might learn some tips and tricks for ways to keep your teeth healthy and free from cavities. When you're done listening to this episode, go back and listen to "How Do You Build Teeth Out of Soap?" another fabulous show with Dr. Emily!

Science is sometimes best when its slow. When you want to learn how materials are affected by the change in atmosphere, you use a balloon to transport them to the edge of space. Listen to this fascinating episode with retired Air Force Colonel Norman Black as he describes how KIDS are learning about the how objects change as they approach the edge of space!

WHERE are the ALIENS? And more importantly, will we recognize them when we find them? Dr. Ryan MacDonald, theoretical astrophysicist with Cornell University, is one of the scientists trying to answer this question. He studies exoplanets and determines the types of atmospheres they have. Will one of these exoplanets have the right atmosphere for aliens to live on it? Listen to this fascinating episode to find out!

Wouldn't it be great if scientists could predict which ocean animals might survive environmental change? That could mean big things for the future of biodiversity in the ocean! Listen to this important and fascination conversation with Dr. Katie Lotterhos of Northeastern University as she describes the cool research her lab is doing to try to answer this question.

Did you know that rhinoceros once lived in North America? (and no, we are not talking about the ones found in zoos). Paleontologists have proof of this amazing phenomenon. Listen to Dr. Alison Pearce Stevens as she tells us all about the awesome discovery of over 200 complete skeletons at Ashfall Fossil Beds State Park. These incredible animals lived more than 12 million years ago due to a massive volcanic eruption.

Have you ever thought about the moths that live in your neighborhood? Why not go outside and get to know them. Listen to this AWESOME chat with Dr. Loree Griffin Burns on how you can host a Moth Ball and learn about the moths that live in your own backyard or nearest nature spot.

Did you know that planting certain plants can actually help to clean up the environment? It's true. Listen to this fascinating chat with Dr. Colleen Kelley as she explains how her research with plants is helping to bring back areas that had been contaminated by heavy metals by making them safe and liveable again.