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What would it take to build a slide so big that it went to the other side of the world?

We try walking through walls and find out that it's not as useful as it might sound.

Find out what would happen if there were no insects - it definitely isn't good news!

What if there were a thermostat that could turn the world temperature down?

If you've had enough of Earth, then why not try living on Venus? We'll tell you why not!

Find out how to shout from one side of the world to the other.

We try out three potential ways to become invisible.

There is a way that Earth could have a second Sun, so we try it out to see what happens.

If moving things with your mind were possible, it wouldn't work quite like you'd expect.

Could there ever be super-gigantic insects or snails?

Could you walk on the ceiling with the help of a black hole or spinning the earth faster?

What would the planet be like if all other humans disappeared?

With the help of a giant gold steamroller, we make a sand castle as big as a real castle!

We find out what would happen if you shrank the earth.

If money grew on trees, you may think you could get rich quickly, but you would be wrong!

Flying like a superhero might sound like fun, but there are some serious downsides.

Removing all the colours from our world would change more than just how it looks.

Is it possible for everyone in the world to eat burgers for every meal?

We try the ultimate basketball shot - finding the hoop after going once around the world!

How to erect a building way taller than anything that's ever been before.

If you could swap your legs with an animal, which animal would you choose?

We try three ways of becoming indestructible and end up destroying the house.

Sometimes the beach is just too far away. So what if you could surf on land?

Can a crazy idea from science fiction solve our energy needs forever?

We borrow from the animals to create a new type of superhero that can walk up walls.