text:  I'm Stephen Dovner. On the next Freakonomics Radio, we talk with a curator of some of the world's most interesting facts. Fondue was invented by the cheese industry. What he has uncovered may make you look at your physical surroundings in a new way. The entire notion of how we interact with the streets being changed by a marketing campaign feels amazing to me. That's next time on Freakonomics Radio. Beginning Tuesday evening at 7.