A website called “The Oracle of Bacon” is hosted by the University of Virginia. (Go to www.mathnature.com for a link to this site, if you wish.) It links other actors to Kevin Bacon by the movies in which the actors appeared. For example, I entered the movie star from Gone with the Wind, Clark Gable, and the Oracle told me that Clark Gable had a Bacon number of two because Clark Gable was in the 1953 movie Mogambo with Donald Siden, and Donald Siden was in the 1995 movie Balto with Kevin Bacon. I tried it again with Will Smith, and the Oracle said that he also had a Bacon number of two since he was in the 2000 movie The Legend of Bagger Vance with Charlize Theron, who in turn was in the 2002 movie Trapped with Kevin Bacon. Robert De Niro has a Bacon number of one because he was in the 1996 movie Sleepers with Kevin Bacon. This trivia game was started by Albright College students Craig Fass, Brian Turtle, and Mike Ginelli, who hypothesized that all actors—living or dead—have a Bacon number of 6 or less. If you could draw a diagram of the relationships between Kevin Bacon and other actors, would the result be a tree?