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!

Seeing as World Earth Day is on the horizon, Dave dedicated today's episode to our lovely little planet. 

He told us how it got it's name, revealed how much gold is hidden across the globe, made us sweat at how hot the core is and puzzled us with, "80% of the creatures on earth have what in common?". You're guess is as good as ours was...

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