This Working Quadcopter Drone Was Built Using Leonardo da Vinci's 500-Year-Old Sketches
Phillip Tracy
Gizmodo
Leonardo da Vinci is best known for works like the Mona Lisa and The Last Supper, but what you might not know is that in the 1480s—hundreds of years before the first flight—the polymath sketched a design for an aircraft. Lacking the right materials, da Vinci never built or tested the helicopter-like device, leaving us...
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