The first thing ever scanned at a supermarket checkout was a 67-cent pack of Juicy Fruit, in Troy, Ohio, in 1974. Now barcodes get scanned ten billion times a day, the price sticker is long gone, and the price on the shelf may soon depend on who's buying. 

Renee and Marc cover freight-car grime, grease pencils, the mark of the beast, and the smart cart that still wants you to hold everything up to the light.

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Join Renee and Marc as they discuss the history of technology, and what it teaches us about now.

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