English scientist and mathematician Sir Isaac Newton (1642 - 1727), creating a shaft of light, circa 1665. By 1684 he demonstrated the whole gravitation theory and in 1705 he was knighted by Queen Anne.   Original Artwork: Engraving by J A Houston, RSA Original Publication: Aldus Disc - People & Personalities - 1353 - 007   (Photo by Hulton Archive/Getty Images)