The article consists of three stories about . The first story is about a named Wan Hu, who made an unsuccessful attempt at in A.D.1500. He built a spaceship powered by 47 rockets using . His idea was , but his dream of flight 500 years later when China successfully launched its first manned Shenzhou V spaceship. The second one is about the Spruce Goose, a designed to meet the need of troops and materials during World War II. It was made entirely of and still holds the record for . Although it was put to use, many of its design features have been incorporated into today’s . The last is about Leonardo da Vinci, the most famous artist of the Renaissance. Apart from his great artistic work, he also drew sketches of with flapping wings controlled and steered by . years later, a professional parachutist made a successful jump using a wood and canvas parachute based on one of .