We all have that one friend who just loves to drop random facts into conversations, just to prove they know stuff. For Dermot, Dave is that friend!

If you’ve ever wondered why airports are laid out the way they are, what you can do at the speed of sound, or what colour eyes you’re best off having, then Dave’s World is the place for you.

The trivia king answered the burning question of why we have the little pocket above the big pocket on our jeans..

Clue: It's not to improve your line dancing

He also told us why tools are being 3D printed in outer space and where the world's largest desert is (it's not where you might think..)

Keep them coming Dave!

You can listen to the chat in full by pressing play in the image above the headline at the top of the page.