You’ve been sending in your questions, and this week…

Zimbobi wants to know why Pluto is no longer a planet, Alfie is curious about why we get brain freeze, Zara wonders if the ocean gets warmer as you go closer to the Earth’s core, and Charlie is fascinated by why whales sometimes explode after they die!

And Amy’s exploring all kinds of planes and how they work. She explains what composites are and how engineers make planes super light yet incredibly strong!