King Arthur's story encapsulates the medieval romance and the tragedy of the Dark Ages. Yet legends shroud his life, and to this day scholars cannot agree on his dates, his location or even whether he really existed.

Do you "know" that posh comes from an acronym meaning "port out, starboard home"? That "the whole nine yards" comes from (pick one) the length of a WWII gunner's belt; the amount of fabric needed to make a kilt; a sarcastic football expression? That Chicago is called "The Windy City" because of the bloviating habits of its politicians, and not the breeze off the lake?