The effect of humor on retention of information was examined. The planetarium at COSI, Ohio's Center of Science & Industry in Columbus, was the source of the study. General public museum visitors were the subjects. A total of 495 adult subjects, ages 18 and older, were involved. Subjects were presented with one of two versions of a 15-minute taped general astronomy show. The two versions were identical except that one had humorous inserts. The humor in the humorous version was related to and integrated with the educational material and was presented at a fast pace. Humor was placed every 90