How the States Got Their Shapes

Mouthing Off (1x10)

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We all live in the same country, so why do we sound do different? It's a matter of where you are on the map. Why didn't the southern accent exist until after the Civil War? How did California athletes end up coining so many new words? Why do we have so many different words for the same things -- like pop versus soda? Will one particularly strong accent cause New York to break up and create a 51st state?