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See what would happen if you really could switch off the sun.
Empty the oceans and you'd see hidden wonders, but you'd also cause the end of the world.
Is it really possible to teleport? Spoiler alert: it could end in disaster!
It's the ultimate baking challenge: making a gingerbread house you could actually live in.
Why waking up with lizard powers would make you useless on earth but a superhero in space!
What happens if you try to catch a falling star? Spoiler alert - probably best not to try!
A fun run goes wrong when one ambitious runner tries running at the speed of sound.
Would it be possible to live on an Earth shaped like a doughnut? You might be surprised!
Find out why living in slow motion would let you see things no-one else can!
Want to reach for the stars? It would be the journey of a lifetime - literally.
What if you could turn things to gold? This episode shows that it might not work out that well.
Some day people will live on the moon – find out just what they are in for.
If you have always wanted to shrink yourself, this is the episode for you!
It really is possible to time travel into the future, and the team show you how!
The planet is being destroyed - but this episode demonstrates the things you can do to help save it.
Find out why a flat Earth would feel very unflat indeed!
Things don't quite go to plan when the moon turns into cheese.
Find out why stopping the earth from spinning isn't such a good idea.
Clouds might look like cotton wool, but if they really were, things would get very messy.
Good news - it's possible to levitate! Bad news – there are some serious side effects.
Experience the ultimate in long distance travel - a holiday on Mars!
Find out why turning into a huge giant would be no fairy tale.
What would happen if there really was a lift that took you all the way up to space?
The deepest hole humankind ever dug only got one thousandth of the way through the earth. But what would happen if you kept digging?
Experience the most extraordinary ride in the universe – falling into a black hole.
