We all like to think we have a good grasp of the workings of the world around us, but do we? In this episode of Brain Games we explore how you might not be as smart as you think. Bet you could explain something as basic as how a zipper works? Or correctly draw something as simple as a bicycle? If you said yes, you likely just bet wrong... But don't worry, it's not just you! Get ready to say hello to what you don't know, on Brain Games.

From the Curio channel: National Geographic Channel.