A human lies up to 200 times a day! Discovering the truth behind a lie is difficult. A common method is using a lie detecor. “Welt der Wunder” has checked the functionality of the so called Poligraph. Christoph Bauer travelled for “Welt der Wunder” through Germany and the USA, sat through poligraph tests and questioned medical experts, representatives of the American Poligraph Association and former FBI agents. On September 28th of 2008 Christoph Bauer presented together with Hendrik Hey the results of his researches on RTL2.