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!

So what do nearly half of Twitter users not do? The answer will make your brain hurt a bit. 

Dave also gave us some facts on the favourite child, our compulsion to lie, men's staring habits and stats on how many friends we have over the years.

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