Have you ever wondered why buses have such huge steering wheels? Or that chocolates always have a zig-zag pattern on the bottom? Just like your car has a weird pattern of black dots on its windows. And have you ever wondered why grocery stores don't have windows? All those things might seem meaningless, but they actually do have a meaning and sometimes hide secrets of items you use every day.

Learn more about your ad choices. Visit megaphone.fm/adchoices