According to Jean Jacque Rousseau, "The world of reality has its limits the world of imagination is boundless." By this, Rousseau indicates that without imagination, life would not be as ideal as it is now. As a result, a person who has no imagination in his life is dull. Two inventors, Leonardo da Vinci and Nikola Tesla through their inventions both men made significant contributions to the quality of man's life. Because of their unique imagination, they produced numerous devices we currently could not live without. Although they were both intelligent inventors, they differed greatly regarding their invention, achievement, and their unusual eccentricities.

To begin with, da Vinci and Tesla both created different inventions through out their lives, which affected society greatly. Da Vinci, a genius, created many drawing for others. One of his drawings, the hygrometer monitors the humidity around the moisture-sensitive paintings. Da Vinci not only...