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50 episodes, newest first. Each one answers a single question in about 5 to 15 minutes.
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How Does a Refrigerator Make My Drink Cold?
You put a warm bottle in the refrigerator and come back to cold water.
Why Do Tears Come Out When I Cry?
The lost dog finally comes home, and your eyes fill with tears.
Why Does My Stomach Growl When I'm Hungry?
You are sitting in a quiet classroom, waiting for lunch. Your stomach suddenly growls loudly enough for someone else to hear. Is it…
Why Do We Need Soap If We Already Have Water?
You rinse greasy pizza fingers under the tap. The water runs over them, but they still feel slippery. Why can water wash away mud but…
Why Do Bites and Cuts Feel Worse in the Shower?
Why do bites and cuts feel worse in the shower? You step into the shower with a mosquito bite or a tiny cut.
How Does Tapping a Credit Card Actually Pay?
You tap your credit card on the machine.
How Do Trees Talk to Each Other?
You see one tree getting eaten by insects, while the tree next to it looks untouched. How could the second tree possibly know there’s…
Why Do Your Fingers Get Wrinkly in Water?
You’re sitting in the bath, and suddenly your fingers look completely different. Why do they get wrinkly while the rest of your skin…
How Does a Cut Heal?
How does a cut heal? You scrape your knee, and a few days later a scab appears and the cut starts closing.
How Does a Battery Make Electricity?
You put a battery into a toy, and suddenly it comes alive. But what is actually happening inside that little battery? Is it just full of…
How Does Google Know What a Red Panda Looks Like?
You search for “red panda,” and the right photos appear almost instantly.
Why Do I Feel Sick When I'm Driving?
Why do I feel sick when I'm driving? You're reading in the back seat, and suddenly your tummy feels funny.
How Did the Dinosaurs Disappear?
You look up at a giant dinosaur skeleton and wonder how something so powerful could vanish.
Where Did Lego Start?
You pick up a LEGO brick, and it feels like it was always meant to look this way.
How Does ChatGPT Sound Like a Real Person?
You ask ChatGPT a question, and seconds later it answers like someone is really talking to you.
How Does Water Come Out of the Tap?
You turn the tap, and water just appears. It feels like it was waiting behind the wall. But where was it one second before? And why does…
How Does the Remote Talk to the TV?
A TV remote feels obvious until you ask the basic question: how does the TV know what you pressed from across the room?
Where Does the Air Conditioner Get Cold Air?
You press the button, and cold air starts blowing out.
Where Does All This Dust Come From?
You wipe the shelf clean.
Why Do Companies Need More Money to Grow?
Why do companies need more money to grow? You build a lemonade stand, and people love it.
How Does Plastic Even Become a Balloon?
You pick up a birthday balloon, and it feels almost impossible.
How Are Stones Made?
You pick up a smooth stone at the beach and it feels… finished. Like someone made it. But no one did.
Wait… Can I Actually Own Part of Apple and Netflix?
Can I actually own part of Apple and Netflix? People buy phones, burgers, shoes and drinks every day, and the companies that make them…
Do Continents Really Move or Is That Just Earthquakes?
You hear about earthquakes and it sounds scary. Like the ground suddenly shakes for no reason.
How Do Astronauts Go to the Bathroom in Space?
You’re floating.
Why Do We Need Vaccines If We're Not Sick?
Why do we need vaccines if we're not sick? You're feeling totally fine, and then it's time for a vaccine.
Why Do We Dream?
You wake up and it felt completely real. Like you were flying… or talking to someone who wasn’t there.
How Do Fish Even Breathe Underwater?
You’re watching a fish and suddenly it hits you…
How Does My Phone Know Exactly Where I Am?
You look at the map on the phone and see the blue dot moving.
How Does a Microwave Heat Food So Fast?
You put cold pizza into the microwave. You press a button. Thirty seconds later it’s hot.
How Is the Mosquito Bite So Silent?
You’re outside, and suddenly later you see a mosquito bite on your arm.
How Does Paper Even Come From Trees?
You’re holding a sheet of paper, and it feels soft and easy to bend. But trees are hard. You can knock on them. They don’t fold.
Why Do I Feel Cold Right After a Hot Shower?
You just stood in hot shower water, and your whole body felt warm.
Why Isn't There Wi-Fi Outside?
At home, your Wi-Fi is always there.
Why Does Lightning Flash?
Why does lightning suddenly flash? You're looking at the sky, and then lightning flashes across the clouds.
Why Do Crabs Walk Sideways?
You see a crab at the beach, and it suddenly runs sideways across the sand. Not forward. Not backward. Only sideways.
Why Is It Important to Eat Protein?
You’re eating, and someone says, “Make sure you finish your protein.”
Where Are All Our Games and Videos Saved?
You press play on a YouTube video, and it starts working. Then suddenly, it stops… and a spinning circle appears.
How Do Glasses Help Us Read?
You put on someone else’s glasses, and suddenly everything looks strange and wrong.
Why Does Rain Fall From the Sky?
You’re outside playing, and suddenly it starts raining. You look up at the sky and think, wait… where did all that water come from?
How Does a Self-Driving Car Drive by Itself?
You might look at a car and suddenly notice something strange. The steering wheel is turning, but nobody is touching it.
Why Can't My Heart Ever Stop Beating?
Why can't my heart ever stop beating? You're sitting still, doing nothing, but your heart keeps going. Thump. Thump. Thump.
Why Is Everyone Always Telling Me to Eat Less Sugar?
You eat a cookie or drink a soda, and suddenly you feel super fast and excited.
What Is Electricity?
You flip a switch and the light turns on right away. But nothing is pouring into the bulb… so what actually moved?
How Does YouTube Know Which Ads to Show Me?
You open YouTube to watch one video.
How Did We Reach the Moon?
You look up at the Moon and it feels impossibly far away.
How Big Is the Sun?
You look up at the Sun, and it just looks like a small bright circle.
Why Does Everything Fall Down?
You drop your pencil and it falls straight to the floor. You toss a ball up and it always comes back down.
How Do Planes Fly?
You look up and see a huge airplane crossing the sky.
Why Is the Sky Blue?
You look up and the whole sky is blue.