Question

why was leonardo da vinci a universal genius

Answer 1

Because he could paint very well,write with both of his hands at the same time. Invent and what not,
he drew the world famous "mona lisa" and drew a painting of an aeroplane 200 years before its discovery.Hence he was the biggest genious who ever lived

Answer 2

Leonardo da Vinci earned the description of Genius for his iconic paintings—“Mona Lisa” and “The Last Supper”—to designs for flying machines and ground-breaking studies on optics and perspective, Leonardo fused science and art to create works that have become part of humanity’s story.