Photograph of an unidentified flying object taken in 1952 by George Adamski, a prolific American photographer of UFOs. Adamski claimed to have several encounters with aliens beginning in the late '40s, and even stated that he had been taken aboard alien spacecrafts and traveled to different planets. His claims drew the attention of several skeptics, and after a series of investigations, his photographs were eventually discredited. Courtesy of the artist's archive.