"Let There Be Light: Greek and Arab scholars and later Europeans such as Descartes and Newton all tried to understand light to gain a better understanding of God. Galileo developed practical tools to manipulate light. His observation that the sun did not go around the Earth, was made with an early telescope. The discovery of the true nature of light had a high impact on the modern world. This led to investigations into the strange relationship between light, the eye and the mind. All of today's technologies - electricity, mobile communications and our ability to illuminate the world 24 hours a day - stem from unravelling the mystery of light."