Pitch is very viscous. It has a viscosity approximately 230 billion times that of water. It is so viscous that an experiment was done by the University of Queensland. The experiment is called the pitch drop experiment. The experiment shows the flow of a piece of pitch over many years. For the experiment, pitch was put in a glass funnel and allowed to slowly drip out. Since the pitch was allowed to start dripping in 1930, only nine drops have fallen. The eighth drop fell on 28 November 2000, and the ninth drop fell on 17 April 2014.