(at about four minutes and 56 seconds into the film) In the film's English dubbed version, Professor Kristoff uses different measurement units in three consecutive sentences: "Because the distance between the Earth's crust and its core is over 6,500 KILOMETERS. And no man has ever descended to a depth of more than THREE MILES. So it's obvious we'll never have a glimmer of true knowledge until we are able to reach a depth of at least a HUNDRED LEAGUES."