evidence: Leonardo da Vinci was a painter, engineer, architect, inventor, and student of all things scientific. His natural genius crossed so many disciplines that he epitomized the term "Renaissance man." Today he remains best known for two of his paintings, "Mona Lisa" and "The Last Supper." Largely self-educated, he filled dozens of secret notebooks with inventions, observations and theories about pursuits from aeronautics to human anatomy. His combination of intellect and imagination allowed him to create, at least on paper, such inventions as the bicycle, the helicopter and an airplane based on the physiology and flying ability of a bat. [...] Da Vinci was born in Anchiano, Tuscany (now Italy), in 1452, close to the town of Vinci that provided the surname we associate with him today. In his own time he was known just as Leonardo or as "Il Florentine," since he lived near Florence—and was famed as an artist, inventor and thinker. [...] Da Vinci’s interests ranged far beyond fine art. He studied nature, mechanics, anatomy, physics, architecture, weaponry and more, often creating accurate, workable designs for machines like the bicycle, helicopter, submarine and military tank that would not come to fruition for centuries. He was, wrote Sigmund Freud, "like a man who awoke too early in the darkness, while the others were all still asleep."