"Lisa the Skeptic" is the eighth episode of The Simpsons' ninth season, first aired on November 23, 1997. On an archaeological dig with her class, Lisa discovers a skeleton that resembles an angel. All of the townspeople believe that the skeleton actually came from an angel, but skeptical Lisa attempts to persuade them that there must be a rational scientific explanation. The skeleton is later revealed to be a publicity stunt for a new mall going up in Springfield, and the townspeople forget their concerns about the skeleton to go shopping. Writer David S. Cohen(pictured) had the inspiration for the episode after visiting the American Museum of Natural History, and decided to loosely parallel themes from the Scopes Monkey Trial. The episode has been discussed in the context of concepts involving virtual reality, ontology, existentialism, and skepticism. The episode received mixed reviews, but has since been used in Christian religious education classes to form a discussion around angels, skepticism, and the balance between science and faith.