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A public address system's speakers emit strange noises, or feedback, when sound gets re-amplified. Get a detailed explanation of how feedback occurs in this podcast from HowStuffWorks.com. Source: howstuffworks.com
Sure we take it for granted the elephant represents the Republican party and the donkey Democrats, but have you ever wondered why? Josh and Chuck explore the foundation of these bizarre political symbols in this old-timey episode of Stuff You Should Know.