400 years ago today, Galileo Galilei demonstrated his first telescope to a group of businessmen in Venice. It was quite enough to impress the laymen and considerably more than enough to annoy the clergy.
Like DaVinci, Galileo was a polymath - a true Renaissance man. He excelled at engineering, mechanics, optics, the physics of motion, playing the lute and painting, just to name a few of his accomplishments.