If you've got 10 minutes, you can learn the history of English — including some interesting background on where specific words and phrases came from. (If you don't have 10 minutes, you can also watch the whole thing one chapter at a time in less-than-two-minute segments.) Interesting note: The equal importance of both The King James Bible and early scientific publications/societies to the formation of English as we speak it today.
Animated history of the English language
Maggie Koerth-Baker is the science editor at BoingBoing.net. She writes a monthly column for The New York Times Magazine and is the author of Before the Lights Go Out, a book about electricity, infrastructure, and the future of energy. You can find Maggie on Twitter and Facebook.