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!

In today's chapter, Dave surprised us with his knowledge of another part of that body that goes red when we are embarrassed.

Himself and Dermot also revealed a few more stunning facts about our 'temples'.

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