Dave tells us one for the road...

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 offering, Dave flummoxed us all with a measurement most of us see every day - yet going by the lack of correct answers, know nothing about. It was hard to believe.

His percentage mind-melter also did a little job us.

You can listen to the chat in full by pressing the 'play' button in the image above the headline.