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!

Dave had lots more interesting bits on this morning's show with a story about Gordon Ramsay showing his softer side, an incredible Chinese mountaineer, an actual epidemic of laughter and a diet in which a man didn't eat for over a year. 

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