Aviation topic

Aviation refers to activities involving man-made flying devices (aircraft), including the people, organizations, and regulatory bodies involved with them. Many cultures have built devices that travel through the air, from the earliest projectiles such as stones and spears, to more sophisticated buoyant or aerodynamic devices such as the mechanical pigeon of Archytas in Ancient Greece, the boomerang in Australia, the hot air Kongming lantern, and kites. There are early legends of human flight... full article at wikipedia