U-Predict - The Arecibo Reply

The Arecibo Radio Telescope broadcast a signal into space on November 16, 1974. The transmission can be arranged into a diagram showing, among other things, a human stick figure, the solar system, the telescope itself and the DNA molecule. In August of 2001 a crop circle appeared close to the Chilbolton radio telescope in Hampshire, England. It was quickly named "The Arecibo reply", as it seemed to be exactly that; a reply to the Arecibo message, describing a different alien race.  Despite years of attempts of debunking, there is no firm evidence that it was a hoax.  Bring your cards and read along as we look at one of the most interesting of unsolved mysteries.