The Philadelphia Experiment refers to a naval military experiment conducted by the United States Navy in 1943. It allegedly aimed to make the destroyer escort USS Eldridge invisible to radar. Reports claim that the ship not only became invisible but also experienced strange phenomena, including teleportation and time travel. The experiment is often linked to conspiracy theories and has been the subject of various books and films. Despite its popularity in popular culture, there is no credible evidence to support the claims of the experiment, and the U.S. Navy has consistently denied its occurrence.