In 1903, the Wright Brothers made the history books with the first "controlled, powered and sustained heavier-than-air human flight." Everyone celebrates the first flight, which was 40 yards in about 12 seconds.
The most interesting aspect of the day is how much the Brothers improved. By the end of the day, they stayed in the air 59 seconds (391% improvement) and traveled 852 feet (610% improvement). In terms of speed, the first flight was 10 ft/second; the final flight of the day was 14 ft/second (40% improvement).