Brains On! Science podcast for kids

Brains On!® is a science podcast for curious kids and adults from American Public Media. Co-hosted each week by kid scientists and reporters from public radio, we ask questions ranging from the science behind sneezing to how to translate the purr of cats, and go wherever the answers take us. @Brains_On


  • Brains On! + The Story Pirates: What makes fun things fun?

    Aug 28 2018

    We're teaming up with our pals The Story Pirates to learn about the science of having fun! Our experts tell us what makes something fun and why we're so geared toward seeking a good time. Plus, the Story Pirates share their song "Pizza Revenge." We've also got a fun-tastic Mystery Sound and a Moment Of Um all about pirates. How fun is that? Still want more fun? Head over to the Story Pirates to hear more (plus the punchline to a Brains On joke) - apple.co/2wwlgDE  Today’s episode is sponsored...more

  • What makes gross things gross?

    Aug 21 2018

    Fair warning: Today we’re gonna get gross! We’re talking sounds, smells, and tastes that some people might find repulsive. But we're asking: why? What's the purpose of disgust? Is it something we're born knowing or do we learn to dislike things? When will entomophagy (the eating of insects) catch on everywhere? Plus: A brand new Moment of Um answers the question "Why do worms come out when it rains?"

  • Keeping water healthy, one clue at a time

    Aug 14 2018

    Last week, we heard about the tale of the Cuyahoga River -- a river in Ohio that caught on fire multiple times because it was so polluted. The river is now doing much better, but beyond the fact that it’s not on currently fire -- how do we actually know it’s healthier today? That’s when being a water detective really comes in handy. Plus: Our Moment of Um answers the question: "Why do dogs wag their tails?" Today’s episode is sponsored by Vamousse Lice (vamousselice.com) and Roshambo Baby (rosh...more

  • Burning rivers of fire

    Aug 07 2018

    Rivers are known for being wet. So how did a river in Ohio suddenly catch fire, not once, but several times last century? In part three of our water series, we'll explore the shocking tale of the Cuyahoga River. We'll look at how pollution led to this environmental tragedy and what's been done to address the problem. Plus, our Moment of Um explains why we say "ow!" when we're hurt.

  • How does GPS know where you are?

    Jul 31 2018

    Without GPS, we’d be lost. Literally. Thanks to these radio transmissions from space though, we’re able to pinpoint our location and find our way home. Join us as we learn all about satellites, how the robot voice of GPS is created and how atomic clocks hold it all together. Plus a mystery sound and a brand new Moment of Um answers the question: "What is light made of?" Today's episode is sponsored by Kind Snacks (KindSnacks.com/BRAINS), Vamousse (vamousselice.com) and Roshambo Baby (roshamboba...more

  • Salty snack science: Popcorn, nachos and the origins of salt

    Jul 24 2018

    We're having a snack attack in this episode and we're using it as an excuse to delve into the facts and history of some of our favorite snacks. How does popcorn pop? Who invented nachos? And where does salt come from? Plus, our Moment of Um tells us all about salt's buddy: pepper! If you want to hear more from our pals at Every Little Thing, you can check them out wherever you listen to podcasts or at https://www.gimletmedia.com/every-little-thing And you can find more Ear Snacks on your favorit...more

  • Wanna see Mars' close approach? Just look up!

    Jul 17 2018

    The Red Planet is putting on a show this July. It'll be closer to Earth than it’s been in 15 years and that means at night it'll appear bigger and brighter than average. In fact, you should be able to see it easily without a telescope! In this episode we'll tell you how to spot Mars plus, you'll hear the planet itself answer your questions. Plus a mystery sound and, in our Moment of Um, we'll explain why lava moves slowly even though it's a liquid. Brains On is sponsored today by Build-A-Bear ...more

  • Smash Boom Best: Books vs Movies

    Jul 10 2018

    Today, we’re sharing another epic showdown from our brand new debate show, Smash Boom Best. Each episode, we pit our favorite things against each other, like bats versus owls! Or pizza versus tacos! And we ask you to decide who won.

  • How to cook for an alien

    Jul 03 2018

    The aliens are coming to dinner! In this episode we wonder what food aliens might eat and talk to real scientists who've thought long and hard about this question. Plus, our friends at America's Test Kitchen show us how to whip up a delicious beef and broccoli dish. We'll lay out the cooking instructions step by step throughout the podcast so you can cook along. When the episode is over, you'll be ready to chow down. Find the recipe here: https://www.brainson.org/shows/2018/07/03/alien-cook-alon...more

  • Mix: The science cooking, pt. 4

    Jun 26 2018

    Are you ready to mix it up? In this episode, we find out why oil and vinegar are like bickering siblings in the back seat of a car, what delicious food inspired the invention of the blender, and the most effective whisking technique (spoiler alert: it's probably not what you think). We also learn how the way we mix flour makes our baked goods either chewy or fluffy and we'll learn the best way to make brownies. Plus: our Moment of Um answers the question "Are bananas radioactive?" To make a don...more

  • Chop: The science of cooking, pt. 3

    Jun 19 2018

    Our knives are drawn and ready to mince and dice our way through the science of chopping. In this episode we'll find out what happens to that carrot you're chopping on a molecular level (spoiler alert: the knife never actually touches it!). We also visit a knifemaker's studio and talk to Splendid Table host Francis Lam to get his chopping tips. This is the third in a five part series on the science of cooking, made in collaboration with America's Test Kitchen Kids. For more recipes and informati...more

  • Chill: The science of cooking, pt. 2

    Jun 12 2018

    From ice cubes to ice cream, cold things are a crucial part of cuisine. How do we use chill to our advantage? This is part two of our series on the science of cooking, a collaboration with the brilliant foodies at America's Test Kitchen Kids. This episode is (literally) super cool. We're figuring out how refrigerators work and why some of their parts are hot. We're traveling back in time to find out how selling ice became a very big business (for a while anyway). And we'll learn why ice cream ma...more

  • Heat: The science of cooking pt. 1

    Jun 06 2018

    We’ve teamed up with America’s Test Kitchen Kids to delve into the scrumptious science of cooking. You’ve sent in so many great cooking questions that we had to spread the answers over four episodes. This is our first installment: HEAT. What crazy chemical reactions does heat trigger in food? How do microwave ovens work -- and why can’t you put metal in them when they’re lined with metal? We’ll answer those questions, find out how feeding squirrels helped profoundly change how we prepare food an...more

  • Boogers and sun sneezes: Know your nose

    May 29 2018

    In this encore mash-up episode, we revisit some fascinating facts that will help you get to know your nose. Why does the sun make some people sneeze? And where do boogers come from anyway? Plus: A brand new moment of um answers the question: "Why do sloths move so slow?"

  • The wonderful weirdness of water

    May 22 2018

    One of the weirdest substances in the universe is right under your nose. No, not boogers. Water! Water seems ordinary, almost boring, but take a closer look and you’ll find a wonderfully weird molecule that behaves like nothing else in the universe. It can move up against gravity. It can absorb lots of heat energy without getting super hot. It can dissolve almost anything. It carves canyons and quenches our thirst. Why is water so weird, and why does that matter? Listen to find out! Today’s epi...more

  • Smash Boom Best: Bats vs. Owls (new show alert!)

    May 15 2018

    For the past few months, we’ve been working on a top secret project and we’re so excited we finally get to share it with you! It’s a new show called Smash Boom Best and it’s nothing but debates. Sort of like the ones you’ve heard on Brains On, but with a few new twists. It’s a little faster paced, a little sillier and we hope you’ll think it’s a lot of fun. Today: Wings out, eyes wide -- we’re swooping in on a battle between a perfect pair of creatures of the night. Which is cooler: Bats? Or ow...more

  • What was the first robot? And more from Robotstravaganza

    May 08 2018

    What was the first robot? What is artificial intelligence? How do robots "learn?" In this special episode, we have pieces from our live Robotstravaganza show in Boston. We meet some awesome robots (including one that's very cuddly), debate whether robots are good for humanity or bad, and find out what robots can learn from nature. Plus a mystery sound and a Moment of Um that answers the question, "How do oysters make pearls?"

  • What's in your water?

    May 01 2018

    What’s in your water, and how did it get there? Clean water is a must, but modern living can put a lot of bad stuff in it. Road salt, fertilizer, dog doo-doo, heavy metals - how do these things get in our water? Why should we care? And how can we tell if our water is healthy? In this episode we hitch a ride on the water cycle with a pair of water drops. We learn about what caused the Flint water crisis. And we hear about one young girl’s award-winning idea for a faster way to test lead in water ...more

  • What makes paint stick?

    Apr 24 2018

    Paint goes on wet, then it dries — and it’s stuck there. But how does it stick? We’re going to zoom way in to find out. We’ll visit a forensic chemist, a painter who makes his own paint and a party happening at the molecular level.

  • Allergy Attack: How our bodies can overreact

    Apr 09 2018

    Pollen, peanuts, dust mites. These things aren't poisonous - so why do some people's bodies act like they are? In this episode, we'll find out what happens during an allergic reaction, explore why only some people have allergies and hear about new treatments. Plus: a brand new Moment of Um answers the question "Why do sunsets have so many colors?" and we'll read a new group of listeners to be added to the Brains Honor Roll! Brains On is sponsored today by Acer Swift 5 (visit acer.com, click on "...more

  • Mystery Sound Extravaganza 2018

    Apr 03 2018

    Sounds abound all around. Do you think your ears are up to the task? We have an episode chock full of nothing but mystery sounds to challenge and stretch your listening powers. Also, did you hear that the Brains On store is open? We couldn't be happier with the t-shirts and other goodies we have to offer. Have a look! brainson.org/shop Brains On is sponsored today by ButcherBox. Go to butcherbox.com/brainson and enter "BRAINSON" at checkout squarespace.com enter offer code BRAINSON

  • How do animals breathe underwater?

    Mar 26 2018

    Our lungs are great at getting oxygen out of the air, but if we needed to do that underwater, we'd be sunk. So how do fish, shrimp, jellyfish and other marine animals breathe underwater? And what happens when there is no oxygen in the water for them to breathe? We answer those questions plus a brand new Moment of Um tackles this sticky one: "Why do we have earwax?" And a new group of listeners gets inducted into the Brains Honor Roll! Give a listen! Today Brains On is sponsored by: • Acer Swift...more

  • 'The Rice Cakes and the Oni': A story from Circle Round

    Mar 20 2018

    Sometimes we're in the mood for a good story, so we're turning our show over to Circle Round this week. It's a podcast produced by WBUR in Boston that tells folktales from around the world. These stories are funny, surprising, suspenseful and downright charming. Here's one we think you'll dig. It stars a kid who loves making jokes, so you know it's up our alley. In the meantime, we're hard at work on some exciting new episodes -- including a brand new show. We'll be able to tell you more about i...more

  • Circadian rhythm pt. 2: Beyond human

    Mar 13 2018

    Circadian rhythms keep our bodies on schedule. But what about the rest of the animal and plant world? Turns out, most living things run on similar cycles. In this episode we take a look at why some animals hibernate. There’s also an interview with a plant. Wait, what?!? You read that right: A PLANT!!! All that and a trip back to pre-history, to see how staying up late might have helped mammals survive all those dinosaurs. Three-word hint: nocturnal bottleneck hypothesis.

  • From 8-bit to orchestras: How does video game music affect you?

    Mar 05 2018

    If you’ve ever played a video game, you know how important music can be when it comes to gaming. But what if you choose to play without music? How does that affect your playing? We’re going to dig into the psychology of video game music, explain how the interactivity of video game music works and figure out what “8-bit” means.

  • The tick-tock of our circadian clock

    Feb 27 2018

    The near 24-hour-cycle that keeps us on track is conducted by the suprachiasmatic nucleus. It’s a tiny part of our brains, but it’s super, super important.

  • ‘Is it opposite day?’ and other mind-bending paradoxes

    Feb 20 2018

    Think about it: the answer to the question “Is it opposite day?” will always be no. So how do you figure out if it is, in fact, opposite day?

  • Our 100th episode! What's the big deal?

    Feb 13 2018

    In this milestone of an episode, we ask why people seem to love the number 100 so much. We also learn some amazing tricks involving the number 100 and fan favorite Gungador goes from Most Epic Fighting Battle Realm to a much more challenging setting: high school.

  • Meet Sandy, the left-handed mutant snail

    Feb 06 2018

    For humans, being left-handed or right-handed can definitely affect the way we experience life. Usually, that mismatch is just a minor nuisance — but sometimes, sidedness can change the future of an entire species, as is the case for Sandy.

  • Dolphins vs. Octopuses: Showdown in the sea!

    Jan 30 2018

    Two of our planet’s most amazing animals go head to head in our latest debate.

  • Dogs: What's the secret of their sense of smell?

    Jan 23 2018

    If you’ve ever seen a dog, you know they like to sniff — the ground, people, each other’s butts. They like to smell just about everything. But why? We’re digging into the science of smell and how dogs are able to decode things we can’t even begin to imagine.

  • Mary Shelley and the science of Frankenstein

    Jan 16 2018

    As we celebrate the 200th anniversary of the novel’s publication, we look at how Mary Shelley was inspired by science and how the lessons of the book still resonate with the scientific world today.

  • Super-size-asaurus: How did dinosaurs get so big?

    Jan 09 2018

    Ancient dinosaurs were some of the biggest creatures to ever stomp the Earth. But how and why did they get so giant? Was there more food to help them grow? Was the planet itself somehow different, allowing them to reach epic proportions? In this episode we talk to dino-experts Femke Holwerda and Brian Switek…

  • Mysteries of the universe: Expansion and gravity

    Jan 02 2018

    In this episode we ponder some big questions from Brains On listeners about the vastness of space.

  • The nerve! Electricity in our bodies

    Dec 26 2017

    Your body is making and using electricity all the time — but how do we do it? We’ll take a look at how bioelectricity helps our brain sends signals and our hearts pump blood. And we’ll learn about some amazing animals that use electricity in weird and wild ways.

  • Charged up! The science of batteries

    Dec 19 2017

    Batteries are everywhere — they’re in our phones, our computers, our cars, our toys. But how do they work? To find out, we talk to a scientist who’s making really big batteries to store renewable energy, another who’s working on really small ones to power our phones, and we play in a park with a dog.

  • High voltage! How electric power reaches your outlet

    Dec 12 2017

    We use electricity all the time, but where exactly does it come from? How does it get to our homes? It’s a fascinating journey that can start hundreds of miles from your outlet.

  • Shocking! The science of static (Electricity series pt. 1)

    Dec 05 2017

    What makes your hair stand on end? Why does your skirt stick your tights? Why do you get zapped by electric shocks when you go to touch a doorknob?

  • Where did language come from?

    Nov 27 2017

    Is it possible to know about the origin of language without traveling back in time? And how do babies learn to speak?

  • Smash: When continents collide!

    Nov 21 2017

    How are mountains made? What causes an earthquake? How does hot lava come bubbling up? The answer in each case is…tectonic plates!

  • Curio: Flies on the bus

    Nov 14 2017

    A few weeks ago, we got two emails that were so similar and so intriguing we had no choice but to investigate.

  • What's smaller than an electron?

    Nov 07 2017

    The natural world can be broken down into atoms. And those atoms can be broken down even further. Will the discovery of smaller and smaller particles ever stop?

  • Healing skin and regrowing limbs: The science of regeneration

    Oct 30 2017

    What superpowers does our skin have to repair itself? And what about other animals like salamanders that can do some pretty extreme healing? We’re going under the skin for this one.

  • What is Down syndrome?

    Oct 24 2017

    You may have heard of Down syndrome, but what is it exactly? In this episode, we'll break down the science of chromosomes and how having an extra one leads to this fairly common condition. Plus, we'll learn some tips for making friends with someone who might seem different than you. We'll also swing by a farm staffed by ranchers with Down syndrome. And in our Moment of Um we'll find out why eggs go from clear to white when cooked.

  • Bonus: Kidcast sampler

    Oct 22 2017

    Looking for more awesome podcasts to listen to? We're bringing you a special bonus episode today to let you know about some of the other podcasts that you might want to check out. And if you want to find lots of other podcasts for kids you can always head to applepodcasts.com/kids

  • Curio: Vampire of the Great Lakes

    Oct 17 2017

    The sea lamprey, with its concentric rows of sharp teeth, is part vampire and part alien invader. Would you let it suction to your arm? Reporter Dan Kraker did. Find out if he lived to tell about it.

  • Narwhals: Unicorns of the sea?

    Oct 10 2017

    In this episode, we learn all about narwhals (what that tusk is for and how they’re connected to the myth of the unicorn) and the evolution of teeth (from scale-like nubbins to the versatile chompers we have today).

  • How do volcanoes erupt?

    Oct 02 2017

    There are all kinds of volcanoes all over the world, but how are they formed? And how do they erupt? To find out, we’ll travel to the center of the Earth, and we’ll meet a NASA robot that’s going on a very special volcano mission.

  • For crying out loud: All about tears

    Sep 26 2017

    It’s something so natural that we take it for granted — but when you think about it, it’s a little strange. Why does water come out of our eyes? And why does it happen when we’re happy? Or sad? Or scared? Or exhausted? In this episode we dive into our mysterious emotional tears, find out […]

  • Curio: Quindar tones and talking in space

    Sep 19 2017

    You know those beeps in old NASA recordings? They’re called Quindar tones. This episode explains them and talks to a couple musicians who incorporate archival, NASA recordings into their songs.

  • Mars: Our next home planet?

    Sep 12 2017

    In this episode we learn about Mars’ ancient past, meet an architect hoping to build cities there and we hear from Mars itself, thanks to the planet’s video blog, of course.

  • Thunder, lightning and tornadoes: Where do they come from?

    Sep 04 2017

    There are some basic ingredients to make thunderstorms and tornadoes. We’ll find out what they are – and how to observe these powerful and amazing storms safely.

  • Animal farts: A mighty wind

    Aug 29 2017

    Most animals fart. And some animals put those farts to work.

  • Sunburns: The why behind the ouch (and how to avoid them)

    Aug 15 2017

    To help us understand sunburns, we’re going deep into the skin to look at cells, molecules and electrons.

  • Everything you need to know before the solar eclipse

    Aug 01 2017

    On Monday, August 21, a total solar eclipse will be visible on a path that crosses the U.S., from Oregon on the west coast to South Carolina on the east coast. In this episode, we cover all your eclipse essentials: What causes an eclipse? What happens during an eclipse? How do you safely view it? Spoiler alert: Don’t stare at the sun without special eyewear.

  • Deep Sea vs. Outer Space

    Jul 18 2017

    It’s time for the next Brains On debate! This intense matchup brings us to the depths of darkness, under the water and beyond our earth’s atmosphere. Who will prevail?

  • Fart Smarts: Understanding the gas we pass

    Jul 04 2017

    Is farting good for us? Where do farts come from? Why do only some make sounds? And what’s up with the smell? We tackle your questions about the gas we all pass in this episode.

  • Riding in the car: Motion sickness and optical illusions (Road trip pt. 5)

    Jun 30 2017

    Hosts Molly and Gabriella are locked out. No worries: Sanden and Bob to the rescue. While the duo drives a spare set of keys to our beloved hosts, they pass the time discussing science you might see (or feel) in a car.

  • Traffic: Phantom jams and chicken soup (Road trip pt. 4)

    Jun 23 2017

    On the fourth leg of our road trip, we figure out where traffic comes from and what it would take to make it finally go away.

  • Monster trucks and car design (Road trip pt. 3)

    Jun 20 2017

    At the third stop on our road trip series, we coast in for a pit stop and check out car design. We find out how monster trucks are different than cars, how culture influences car design and what it’s like to make car into animated, talking movie stars.

  • The future of fuel, and the problem with exhaust (Road trip pt. 2)

    Jun 16 2017

    Our planet needs some carbon dioxide, but cars are pumping more into the atmosphere than our carbon cycle can handle. We’ll explore what all this carbon means for our planet. And we talk to a scientist who is working to change how we fuel our cars, so we can cut back on all this carbon dioxide.

  • How do engines work? (Road trip pt. 1)

    Jun 09 2017

    On the first leg of our road trip, we’re exploring the history of engines and how they work, with a little help from Car Talk’s Ray Magliozzi.

  • Mystery sound extravaganza!

    Jun 06 2017

    There are a whopping 10 sounds for you to guess in this episode. Are your ears up to the challenge?

  • Books: How they're made and how your brain reads them

    May 23 2017

    What happens in your brain when you read? What goes into the writing of the words? And what about the making of the books themselves, the physical objects?

  • The science of slime: What is it and why are we so obsessed

    May 09 2017

    Homemade slime is sticky, gooey and all the rage, but what is it? When you combine ingredients like glue and laundry detergent you get a strange, flubbery substance. We’ll explain what’s happening on a molecular level to make this stuff.

  • What was the first life on earth?

    Apr 25 2017

    What was the very first lifeform like? What was the first fish or mammal? Is it even possible to know?

  • How do pianos work?

    Apr 11 2017

    In this episode, we take a field trip to a piano shop, peek behind the walls at a world-famous piano factory and have an EPIC FIGHTING BATTLE to discover how sound travels.

  • How do elevators work?

    Mar 28 2017

    Elevators are like magic. You walk in, the door shuts and when it opens again, you are suddenly someplace new! Ta da! But it’s not magic that does this trick, it’s science and engineering.

  • Why is the ocean salty?

    Mar 14 2017

    If you’ve ever been the ocean, you’ve tasted that salt. But where does it come from? And why aren’t lakes and rivers salty too? A sea shanty is probably the best way to explain, right?

  • Ants: Who's in charge here?

    Feb 28 2017

    We have a lot to learn from ants. This episode digs into the hierarchy of ant colonies (spoiler alert: there is none) and why they walk in a straight line (spoiler alert: they don’t).

  • Do we all see the same colors?

    Feb 14 2017

    What if the color that you call blue and the color I call blue don’t look the same at all? When our brains see color, we’re really just seeing waves of light. Sure, we may be seeing the same waves when we look at the color blue, but do we know if our brains are interpreting those waves in the same way?

  • Cats: Glowing eyes, puffy tails and secret purrs

    Jan 31 2017

    Why do cat eyes look the way they do? Can cats really see in the dark? And what are they trying to tell us with that purr (you know the one)?

  • Dinosaur bones: How do we know their age?

    Jan 17 2017

    Fossil dating is a lot like eating a delicious ice cream cake. Well, sort of. We find out how scientists look at the rock and elements AROUND a fossil to figure out its age. Plus: We talk to a scientist who studied one of the coolest fossils discovered recently: a dinosaur tail trapped in amber, complete with feathers!

  • Lighting the way for sea turtles at Gulf Islands National Seashore

    Dec 30 2016

    We don’t know much about the long life of a sea turtle, since it’s mostly spent in the ocean. When they do come ashore to lay their eggs, we know the babies use the moon and stars to guide them back to sea. But what happens when hotels and houses and streetlights compete for their attention?

  • Surviving the desert at Joshua Tree National Park

    Dec 29 2016

    The desert is hot, dry and deadly. But plenty of plants and animals thrive there. How do they do it? We’ll learn the tricks trees, bats and roadrunners use to make it in Joshua Tree National Park in California.

  • Making the sands sing at Great Sand Dunes National Park

    Dec 28 2016

    When an avalanche happens at the Great Sand Dunes in Colorado, it sounds like the sand is singing. Huh? How? Why? We learn about the special sand and the specific conditions that make this acoustic phenomenon possible.

  • Tracking wild horses at Assategue Island National Seashore

    Dec 27 2016

    The wild horses at Assateague Island National Seashore in Maryland are very popular, but they’re also an invasive species. We find out how park rangers are giving people a chance to see the horses while also protecting the native plants and animals FROM the horses.

  • Going underground and Wind Cave National Park

    Dec 26 2016

    Producer Marc Sanchez shows us the wonders hidden underground at this national park in South Dakota and how tricky it can be to explore uncharted territory with only a headlamp to light the way.

  • How does the internet get to us?

    Dec 20 2016

    In this episode, we find out how a system of cables around the globe (and deep in our oceans) brings websites, songs, videos and podcasts to our phones and computers, almost at the speed of light.

  • What makes cute things cute?

    Dec 06 2016

    Think of the cutest puppy, kitten or baby you’ve ever seen. Now what sound did you just make? Was it an “Awwwww?” Or did you want to pinch, bite or squeeze it? In this episode, we’ll find out why this is a natural reaction to cute and why we’re so easily distracted by cute things.

  • Fire vs. Lasers!

    Nov 22 2016

    Fire and lasers are both super cool — but which is COOLER? Producer Marc Sanchez has tricks up his sleeve for team fire and Sanden Totten gives his all for team laser.

  • How do whales communicate?

    Nov 08 2016

    The sounds whales make underwater are super cool, and also very important for them to locate prey, navigate and communicate with each other. We find out how they make those sounds and what scientists think they mean.

  • Body Bonanza: Yawns, hiccups, goosebumps and more!

    Oct 25 2016

    The terrific topics tackled in this episode: Hiccups, yawns, getting dizzy, goosebumps, fingerprints, limbs falling asleep, brain freeze, chattering teeth and why your voice sounds different when it’s recorded.

  • Could it rain lemonade?

    Oct 11 2016

    If you filled a lake with lemonade, would it rain lemonade? This delicious head-scratcher does not have a straightforward answer. It’s one-part water cycle, one-part delicious drink and if we’re lucky, one-part lemonade rain.

  • How do invisible x-rays help us see?

    Sep 27 2016

    X-rays, part of the electromagnetic spectrum, help doctors see our bones — but they also help scientists understand the very smallest particles and the most massive black holes.

  • Carnivorous plants: How they lure, trap and digest

    Sep 16 2016

    Most plants get the energy and nutrients they need from water, sunlight, air and soil. But carnivorous plants get key nutrients from a different source: bugs. We’ll find out how they do it and talk about the mystery of how venus fly traps snap shut.

  • What's behind the waves and tides?

    Aug 30 2016

    How does the moon control the tides? Where do waves come from? And what’s it like to live in a tide pool?

  • How is glass made?

    Aug 11 2016

    The process that turns sand into glass is very cool – or rather, we should say very hot. Very, very, very hot as it turns out. Humans have been turning minerals from the earth’s crust into glass for 3,500 years. Find out how it’s done and how it’s evolved – from blowing glass by hand to a factory that makes hundreds of glass bottles every minute. Plus: The mystery sound!

  • Mosquitoes: What are they good for?

    Jul 15 2016

    How and why do mosquitoes suck our blood? Why do their bites itch ALL the time? Why do some people get bitten more than others? And do these pesky and possibly dangerous insects serve any kind of useful purpose?

  • How do airplanes fly?

    Jun 28 2016

    How do planes stay in the air? And how did humans figure out that it wasn’t enough to just strap wings to our arms and flap them like birds?

  • Big universe, big questions

    Jun 14 2016

    Have you ever wondered about what’s beyond the edge of the universe? Or maybe a better question: is there even an edge of the universe? And what does it mean that the universe is expanding? Nine-year-old Thea talks with astrophysicist Katie Mack to find answers to her many questions about the universe.

  • The how's and why's of hair

    May 31 2016

    Why do humans have hair and not fur? How does hair grow? Why does it turn gray? How does hair become curly or straight? Black, brown, blonde or red?

  • Why don't carnivores need to eat their vegetables?

    May 17 2016

    We’re back with new episodes! Carnivores are animals that only eat other animals – so how do they get the vitamins, minerals and fiber that we humans get from eating plants? We take a trip to a salad bar with some animal pals to find out.

  • How do you catch a cold?

    Apr 22 2016

    We’ve been catching colds for millennia – but it wasn’t until fairly recently that we actually understood how and why we get sneezy, coughy, and achy. In this episode, we find out more about the common cold: Does standing outside in the cold actually make it easier to get sick? Is there a cure that really works? Could there be a benefit to catching the rhinovirus? Listen for all the answers + the mystery sound!

  • Is there life on other planets?

    Apr 07 2016

    Is there anybody out there? Like, WAAAAY out there? In this episode we hear from astronomer Laura Danly about the search for life on other planets. We’ll also learn what that search has in common with a fairy tale.

  • Extinction!

    Mar 22 2016

    Did Dinosaurs have feathers? Can you bring back species that have gone extinct? Find out here.

  • Brains On! Besties

    Mar 08 2016

    Meet the Brains On! Besties… kid-friendly audio finds we think you’ll love.

  • Living Large with the International Space Station

    Feb 21 2016

    The International Space Station sits 250 miles above Earth, but how did it get there? And what’s it like to live in space?

  • Mystery sound extravaganza!

    Feb 10 2016

    OMG, this is the episode you’ve been waiting for… an all-out, wall-to-wall, super-duper Mystery Sound show. Guess the sounds sent in from listeners and scientists alike. Plus, if you like having fun (and dancing), stick around to the end of the episode. An extra-special audio treat awaits. Shhhhhhhhhh!

  • Spider sense

    Jan 26 2016

    Do spiders give you the heebie-jeebies? If so, we want to change your mind about our eight-legged buddies!