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 ...

zipcodes run diagnoally across the country from maine to socal. maine starts with 0 and socal stuff starts with 9. that's all i know. By July 1963, a five-digit code had been assigned to every address ...