Seasons & Episodes
You Fell Into a Black Hole?
Experience the most extraordinary ride in the universe – falling into a black hole.
You Could Dig Through the Earth?
The deepest hole humankind ever dug only got one thousandth of the way through the earth. But what would happen if you k
You Could Take a Lift to Space?
What would happen if there really was a lift that took you all the way up to space?
You Could Turn into a Giant?
Find out why turning into a huge giant would be no fairy tale.
You Could Go on Holiday to Mars?
Experience the ultimate in long-distance travel - a holiday on Mars!
You Could Levitate?
Good news - it’s possible to levitate! Bad news – there are some serious side effects.
Clouds Were Made Out of Cotton Wool?
Clouds might look like cotton wool, but if they were, things would get very messy.
The Earth Stopped Spinning?
Find out why stopping the Earth from spinning isn’t such a good idea.
The Moon Was Made of Cheese?
Things don’t quite go to plan when the moon turns into cheese.
The Earth Was Flat?
Find out why a flat Earth would feel very unflat indeed!
We Could Actually Stop Climate Change?
The planet is being destroyed - but this episode demonstrates the things you can do to help save it.
You Can't Wait for Christmas?
It really is possible to time travel into the future, and the team show you how!
You Could Shrink Yourself?
If you have always wanted to shrink yourself, this is the episode for you!
You Could Live on the Moon?
Some day people will live on the moon – find out just what they are in for.
Everything You Touched Turned to Gold?
What if you could turn things to gold? This episode shows that it might not work out that well.
You Could Actually Reach for the Stars?
Want to reach for the stars? It would be the journey of a lifetime - literally.
You Could Live in Slow Motion?
Find out why living in slow motion would let you see things no-one else can!
The Earth Was Shaped Like a Doughnut?
Would it be possible to live on an Earth shaped like a doughnut? You might be surprised!
You Could Run at the Speed of Sound?
A fun run goes wrong when one ambitious runner tries running at the speed of sound.
You Try to Catch a Falling Star?
What happens if you try to catch a falling star? Spoiler alert - probably best not to try!
You Woke Up as a Lizard Superhero?
Why waking up with lizard powers would make you useless on earth but a superhero in space!
You Could Build a Gingerbread House?
It’s the ultimate baking challenge: making a gingerbread house you could actually live in.
You Could Teleport?
Is it really possible to teleport? Spoiler alert: it could end in disaster!
You Took All the Water Out of the Sea?
Empty the oceans and you’d see hidden wonders, but you’d also cause the end of the world.
You Could Switch Off the Sun?
See what would happen if you really could switch off the sun.
You Could Fly Like a Bird?
Anyone can fly like a bird – you just have to travel across the solar system to do it!
You Built a Mega Slide?
Could you build a slide to the other side of the world? You would need to start in space, use the slippiest slide ever a
You Walked Through Walls?
Wouldn't it be cool to be able to walk through walls? From turning into a gas to quantum trickery, we discover why it wo
We Got Rid of Bugs?
Bugs might be annoying, but we would soon regret it if we got rid of them - all our favourite foods would disappear, and
You Needed Two of You?
From cloning to 3D printing, what if we could actually make copies of ourselves?
You Could Stop Global Warming?
Imagine if we had a thermostat that could turn the world temperature down - could we fix global warming? But be careful,
You Lived on Venus?
Venus has acid rain, crushing pressure and is hotter than an oven, so it might not sound like the ideal place to live. H
You Could Shout Round the World?
Find out how to shout from one side of the world to the other.
You Were Invisible?
We try out three potential ways to become invisible and discover some surprising side effects.
We Had Two Suns?
There is a way that Earth could have a second sun, so we try it out to see what happens.
Your Mind Could Move Things?
We imagine a world where it's possible to move things with your mind like films, but find that the laws of physics mean
Animals Were Supersized?
We look at whether some animals can get gigantic and find out that if you are being chased by a giant snail or a humungo
You Walked on the Ceiling?
We try using a gravity-bending black hole and spinning the earth faster to see if we can make it possible to walk on the
You Were the Last Person on Earth?
What would the planet be like if all other humans disappeared, leaving you as the last person on earth?
You Built a Giant Sand Castle?
Is it possible to build a sand castle the size of a real castle? We imagine how it could be done, using a pneumatic dril
You Shrunk the Earth?
We find out what would happen if you shrank the earth. You could jump higher and move faster, but you would end up with
Money Grew on Trees?
If you had a tree that could grow money, would that make you rich? Even if you wait 20 years for your tree to grow, you
You Flew Like a Superhero?
Flying like a superhero may sound like enormous fun, but there are some serious downsides that Hollywood does not tell y
There Were No Colours?
Imagine removing all the colours one by one? It would change more than just how things look, and after taking out just t
You Only Ate Burgers?
If everyone in the world ate nothing but cheeseburgers, we would run out of land, and even if we went meat-free, we woul
You Threw a Ball Round the World?
To throw a ball around the world, you need to start out in space, throw it ten times the speed of a bullet and make sure
You Built the Tallest Building on Earth?
We reveal how to create the ultimate in tall buildings by going to the moon and taking inspiration from wedding cakes.
You Had Kangaroo Legs?
To win a marathon, are you better off with the bouncing legs of a kangaroo, the long legs of a T. rex or sticking with t
You Were Indestructible?
We imagine becoming unbreakable by removing our bones, turning our skin to metal and finally by becoming completely elas
You Surfed Without Water?
Sometimes you want to go surfing, but it's too far to the beach, so we try surfing on land with the help of a volcano an
Earth Ran Out of Energy?
We try out a crazy idea from science fiction to build a giant sphere around the sun and give us more energy than we'll e
You Could Walk Up Walls?
We take inspiration from the natural world as we imagine a new kind of superhero that can walk up walls.
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