Leonardo da Vinci: ornithopterLeonardo da Vinci's designs for an ornithopter, a traveling machine saved aloft because of the beating of its wings, c. 1490. It’s a go-to supply for any person planning to keep https://bytesbaazar.com/collections/all?srsltid=AfmBOoqO593lFfWhNbizqiP2ETSb8Pu_5EtQL40-rdJjBS4tb2RvgxvR