Fig. 1. (A ) The first public demonstration of ether anesthesia was on October 16, 1846. W. T. G. Morton, M.D., is depicted, holding the ether, whereas J. C. Warren, M.D., performed the operation. This painting is by Robert C. Hinckley (1853–1941), used with permission by Boston Medical Library in the Francis A. Countway Library of Medicine. (B ) The Wright brothers first flight on December 17, 1903, at Kitty Hawk, North Carolina. The picture is public domain (http://www.wpclipart.com/world_history/the_hand_of_man/wright_brothers_first_flight; Accessed November 10, 2010).