"For thousands of years humans watched birds and dreamed of this. Two brothers with a bicycle shop changed history in 12 seconds. What am I?"

Answer: The Aeroplane. The Wright Brothers, Orville and Wilbur, made the first powered, controlled aeroplane flight on 17 December 1903. It lasted 12 seconds and covered 120 feet. Within decades, aircraft were crossing oceans and within 66 years humans reached the moon.