The Big Question: What do you want to know?

What are some of the biggest questions you can think of? What really puzzles your brain box? What gets your noggin itching? Well, we want to know!

Here at Newsround, we're trying to answer some of the big questions that sometimes pop into your head.

Like, how do you measure a mountain?

Or, what's the difference between a tangerine, satsuma and clementine?

Well, maybe we could help you find out? Send us an email and we'll see what we can do.

Send us your BIG questions...

• What do you want to know?

• What brain teasers get you thinking?

This chat is now closed - we will be answering as many of your questions as we can so stay tuned!