“Where the spirit does not work with the hand, there is no art.”    The great Renaissance polymath Leonardo da Vinci (1452-1519) –timeless artist, engineer, architect, mathematician, and scientist, with profound knowledge in science from anatomy and optics to physics to light –is commemorated at the Louvre Museum, Paris for the fifth centenary of his death. In his quest to understand the relation between the physical and the metaphysical, he spent a lifetime studying the human being and its place in the universe. His extraordinary creativity, endless genius, and artistic talents arching far beyond the perceptual and scientific realities of …