Hey You What If?

1. You Built a Mega Slide?

Could you build a slide to the other side of the world? You would need to sta...

2. You Walked Through Walls?

Wouldn't it be cool to be able to walk through walls? From turning into a gas...

3. We Got Rid of Bugs?

Bugs might be annoying, but we would soon regret it if we got rid of them - a...

4. You Needed Two of You?

From cloning to 3D printing, what if we could actually make copies of ourselves?

5. You Could Stop Global Warming?

Imagine if we had a thermostat that could turn the world temperature down - c...

6. You Lived on Venus?

Venus has acid rain, crushing pressure and is hotter than an oven, so it migh...

7. You Could Shout Round the World?

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

8. You Were Invisible?

We try out three potential ways to become invisible and discover some surpris...

9. We Had Two Suns?

There is a way that Earth could have a second sun, so we try it out to see wh...

10. Your Mind Could Move Things?

We imagine a world where it's possible to move things with your mind like fil...

11. Animals Were Supersized?

We look at whether some animals can get gigantic and find out that if you are...

12. You Walked on the Ceiling?

We try using a gravity-bending black hole and spinning the earth faster to se...

13. Gerner gibt Laura die Schuld an Sunnys Verletzung

While Gerner blames Laura for Sunny's injury, she is relieved that her mother...

14. You Built a Giant Sand Castle?

Is it possible to build a sand castle the size of a real castle? We imagine h...

15. You Shrunk the Earth?

We find out what would happen if you shrank the earth. You could jump higher ...

16. Money Grew on Trees?

If you had a tree that could grow money, would that make you rich? Even if yo...

17. You Flew Like a Superhero?

Flying like a superhero may sound like enormous fun, but there are some serio...

18. There Were No Colours?

Imagine removing all the colours one by one? It would change more than just h...

19. You Only Ate Burgers?

If everyone in the world ate nothing but cheeseburgers, we would run out of l...

20. You Threw a Ball Round the World?

To throw a ball around the world, you need to start out in space, throw it te...

21. You Built the Tallest Building on Earth?

We reveal how to create the ultimate in tall buildings by going to the moon a...

22. You Had Kangaroo Legs?

To win a marathon, are you better off with the bouncing legs of a kangaroo, t...

24. You Surfed Without Water?

Sometimes you want to go surfing, but it's too far to the beach, so we try su...

25. Earth Ran Out of Energy?

We try out a crazy idea from science fiction to build a giant sphere around t...

26. You Could Walk Up Walls?

We take inspiration from the natural world as we imagine a new kind of superh...