When the cashier finished ringing up the damages, Mom handed over the cash, and the cashier handed back a ribbon of receipt and a corresponding amount of S&H Green Stamps. (Kids, did you notice ...

PHILATELISTSIt all started in the early 19th century, when the postal system was, frankly, a bit of a mess. Back then, sending a letter was a complicated and expensive ordeal. The recipient—not the ...