"Anybody who has ever been inside a supermarket has encountered greater variety in five minutes than Marco Polo was exposed to in a lifetime. Hundreds of breakfast cereals stand across the aisle from as many different cookies, including enough subspecies of chocolate chip to provide the adventurous a new type each day of the month.
But that's just the start: The average grocery store stocks 30,000 distinct items, of which 20,000 are unceremoniously dumped and replaced annually."