Original 1947 AP Wire Photo showing a model drone fly used in research by the American Museum of Natural History and Sperry Gyroscope Co. to study how flies maintain balance and directional control in flight. The caption explains the function of the vibrating halteres, often described as nature's "gyroscopes." Caption is separate and mounted with the photograph on black archival paper. Overall mounted size is approximately 9 x 8¼ inches. From the archive of a Pittsburgh area newspaper.
