Wings

Josh did not answer for a moment. He was studying the man carefully. He saw at once that the wings were not a part of the man's body. The crossed belts across the man's chest held the apparatus in place. There were, he saw, some sort of cables, tiny, almost invisible, that ran down the legs and fastened at the ankle. Other cables ran down the arms and fastened around the wrist. He did not understand but saw that the cables were attached to the wings. Somehow these people had learned how to create artificial flight in a way that men on earth had always dreamed. He remembered suddenly that Leonardo da Vinci had devised a set of wings but had never proven them to be practical.