79 true stories for curious children, each one fact-checked and read by a human editor. Tap any title to read its transcript and sources.
On the island of Yap, one famous kind of money was carved from giant stone wheels that hardly ever moved, and one stone kept its value from the bottom of the sea.
Everyone yawns, yawns are strangely catchy, and scientists still argue about why, which makes the yawn a real live open mystery you carry with you.
Alfred Wallace noticed that two neighbouring islands had strikingly different animals, and drew an invisible line in the sea where the animal worlds change.
Your brain forecasts your own touch and turns the feeling down, which is why self-tickling hardly works. A giggle that reveals how brains expect the world.
Every town once kept its own private time, until railways made the muddle dangerous and the world gradually agreed to share standard time.
Stars twinkle because the moving air above us wobbles their light, while planets usually shine more steadily. A stargazer's clue for telling them apart.
Some people truly see colours when they hear sounds or read letters. It is real, harmless, and a window into how differently brains can paint the world.
The tallest known living thing is a coast redwood tree taller than a thirty-storey building, and it lifts water to its crown with no pump at all.
In the middle of Los Angeles, sticky pools of natural asphalt trapped Ice Age mammoths, wolves and sabre-toothed cats, and kept their remains like a library.
A submarine dives by drinking in seawater and rises by pushing it out again, the same floating trick many fish were born knowing.
Frank Epperson's family story says he invented the ice pop by accident at age eleven, leaving a fizzy drink out on a cold night. A delicious tale, told honestly, legend and all.
Isaac Newton let a beam of sunlight through a glass triangle and proved that white light carries a whole rainbow inside it.
On the island of Bali, farmers carved whole mountainsides into watery green staircases, and have shared the water fairly for about a thousand years.
Post a letter and an invisible relay of collectors, sorting machines, and carriers finds one single door among millions.
A made-up story often gives your brain double work, minding the truth and the invention at once, and honesty skips that whole load.
Mangrove trees grow where land meets ocean, breathing through snorkel roots, sheltering baby fish, and softening storm waves for the villages behind them.
Cut an onion and it fires an invisible spray that stings your eyes on purpose. The kitchen chemistry of onion tears, and the tricks that truly help.
Ignaz Semmelweis proved with careful counting that disinfecting hands saved mothers' lives, but he shared his discovery so angrily that many would not listen.
Ships kept getting lost because no clock could keep true time on the waves, until a carpenter named John Harrison spent most of his life building one that could.
Almost everything shrinks and sinks when it freezes, but water swells and floats, and that one oddity keeps fish alive under every frozen pond.
Inky the octopus vanished from his tank in a New Zealand aquarium, and a wet trail led to a drainpipe that ran home to the ocean.
Flamingos hatch grey and turn pink because of what they eat, which means a flamingo is a walking picture of its dinner.
The rumble in your middle is gas and juices being squeezed along your gut, loudest between meals when the cleaning waves sweep through, and doctors have a wonderfully funny name for it.
Two explorers rode a steel bubble eleven kilometres down to the bottom of the Challenger Deep, and found the deepest place on Earth was not empty.
The king of fruits smells overwhelming on purpose: its odour is an advertisement to the forest animals that spread its seeds.
A few slow, gentle breaths can truly help your body settle, because breathing is wired to the body's own calm-down system. A tool you carry everywhere.
Chocolate begins as seeds inside a pod on a tropical tree, and much of the pollination that makes the pods depends on flies almost too small to see.
Mary Anning, a poor girl hunting fossils on an English beach, dug out sea creatures nobody believed existed and changed what the world knew about ancient oceans.
Leafcutter ants do not eat the leaves they carry; they feed them to an underground fungus garden they have farmed for millions of years.
A sushi chef with too few helpers watched beer bottles glide through a factory — and invented the restaurant where the food comes to you.
London taxi drivers memorise a whole city — and scientists found that the map-part of their brains actually grows. Yours can too.
Marie Tharp mapped the hidden mountains of the ocean floor without ever sailing — and found a giant crack that changed how we see the Earth.
Your teeth grow in tiny daily layers, like tree rings — and in most baby teeth a special line marks the day you were born.
Honeybees tell each other where the best flowers are — with a waggling dance that works like a treasure map.
Scientists discovered that humpback whales sing real songs — and a record of their singing helped convince the world to protect them.
Tall wheat kept falling over and starving harvests — until Norman Borlaug bred a short, strong wheat that helped feed hundreds of millions.
The little teeth on your jacket lock together like magic — but it's not magic, it's one of the cleverest tiny machines ever made.
Scientists gave spinach plants a tiny upgrade so they could report what they taste in the ground — and the plants sent word to a phone.
An inventor dragged his fingers through beach sand — and helped invent the black-and-white stripes now on most things in every shop.
Before machines, a 'computer' was a person's job — and an astronaut refused to fly until one brilliant woman had checked the machine's numbers.
Scientists in the Netherlands mixed sleeping bacteria into concrete — so when a crack lets water in, the tiny builders wake up and seal it.
Farmers ploughed away the grass that held the soil down — until the soil itself took to the sky and blew all the way to the capital city.
Before erasers, people rubbed out pencil marks with bread — and the material that replaced it got its very name from the job.
Everyone believed the black-footed ferret was gone forever — until a ranch dog named Shep brought one home.
Scientists who study friendship found its simple secret ingredients — being near, playing together, taking turns.
Ships once sailed across the world for mountains of seabird droppings — because bird poo turned out to be plant food more precious than almost anything.
That wild rooster strutting through the neighbourhood is a red junglefowl — the wild ancestor of every chicken on Earth.
Four boys and a dog followed a hole in a French hillside — and discovered a cave of paintings around twenty thousand years old.
Mikaila was stung by bees twice in one week — and what she did next turned a lemonade stand into a real company.
Scientists put one marshmallow in front of children and made a famous discovery about waiting — and a wiser one years later.
In a town built around a rubbish dump in Paraguay, children play real music on violins and cellos made from thrown-away things.
One of the greatest medical discoveries ever is a simple drink of clean water, salt, and sugar — and it has saved millions of children.
An owl can fly right past your ear with barely a whisper — and its secret feathers helped make Japan's fastest trains quieter.
Scientists found a hole growing in Earth's sunscreen layer — and every country on Earth agreed to fix it together. It's healing right now.
A storm knocked over a tree in England, something strange and black lay underneath — and the pencil in your hand began.
A young scientist named Jocelyn refused to skip one fingernail-sized squiggle on miles of paper — and found a brand-new kind of star.
When Gitanjali Rao heard that a city's tap water had hurt children, she was eleven — and she invented a device to test water fast.
Salmon must swim home up rivers to lay their eggs — so when dams blocked the way, people built them staircases of water.
The bag on your back is a piece of engineering — woven threads, clever foam, tested straps — that travelled the world to reach you.
A boy from Singapore took a photo with the greatest swimmer on Earth — and eight years later, raced him in the Olympic final.
Scientists tested whether giving treats away makes toddlers happier than getting them — and the answer glows.
In Estonia, when people were not allowed their own flag or anthem, hundreds of thousands gathered and simply sang — until their country was free.
On one Indonesian island, grandparents' stories taught every child one life-saving word — and one day, that word saved nearly everyone.
The tiny helpers that make yogurt keep a memory of the germs that attack them — and scientists proved it in a yogurt factory.
A little robot bounced onto Mars, found tiny round stones nicknamed blueberries, and read the rocks like a book about long-ago water.
The giant planets lined up like stepping stones, and two little spaceships rode the line farther than anything people have ever built.
A pilot with two sticks of gum, a city of hungry children, and the little parachutes that fell from the sky — the true story of the Berlin Airlift,
The sea is full of sound — crackling shrimp, grunting fish — and baby fish find their way home by listening.
Far away, two black holes bumped together and made all of space wobble — and people built the quietest listening machine on Earth and caught it.
A navigator crossed the huge Pacific with no compass and no map — reading stars, waves, and birds all the way to Tahiti.
When wolves came back to a great park, the whole web of living things began to knit itself together again.
Sailors kept getting mysteriously ill on long voyages — until a ship's doctor ran one of the first fair tests and lemons won.
In a far desert, explorers found the first dinosaur eggs — and maybe the truth behind an ancient monster legend.
A volcano was born at the edge of a little island town, and the people fought its fiery flow with seawater — and won.
Long ago, people really ate dinner inside a giant dinosaur statue — and its funny wrong horn teaches how science fixes its guesses.
An invisible, harmless rain from the sky passes through stone — and by counting it, scientists found a hidden space inside the Great Pyramid without moving a single block.
High above us, satellites with perfect clocks are drumming out a beat — and your phone listens to find out exactly where you are.
The biggest digging project on Earth was losing to a tiny mosquito — until a doctor-engineer beat the bite.
A doctor with a map, a mystery illness, and the missing pump handle that helped save a city.