It's very easy to chalk up certain facets of our lives to just being "the way it's always been." From daylight savings time to time zones, most of us don't even give a second thought to the meaning ...

The humble ZIP Code shows up in all kinds of surprising places. Planet Money looks at how it was born, how it transformed the mail and talks to one researcher who argues that it's gone too far. The ...

Log-in to bookmark & organize content - it's free! The 1960s folk band "The Swingin' Six" stars in a U.S. Postal Service public service announcement explaining the zip code system, which was first ...