What's the Greatest World's Fair of All-Time?

From electric toothbrushes to Belgian waffles, banana splits to robot presidents, plenty of wonderful things have been introduced at World's Fairs. But does the event still occur, and why doesn't America host them anymore? Will and Mango dig into their favorite World's Fairs, their historical importance, and why we might not have Disney World without them. Learn more about advertising on the HowStuffWorks podcasts at www.howstuffworks.com/advertisers.htm And to learn about your ad choices when listening to podcasts, visit https://www.howstuffworks.com/privacy.htm#ad-choices