"And now I drew a symbol whose meaning Dwayne had known for a few years in school, a meaning which had since eluded him. The symbol would have looked like the end of a table in a prison dining hall to Wayne. It represented the ratio of the circumference of a circle to its diameter. This ratio could also be expressed as a number, and even as Dwayne and Wayne and Karabekian and Beatrice Keedsler and all the rest of us went about our business, Earthling scientists were monotonously radioing that number into outer space. The idea was to show other inhabited planets, in case they were listening, how intelligent we were. We had tortured circles until they coughed up this symbol of their secret lives:"
Kurt Vonnegut Jr. Breakfast Of Champions