Scientists tell us that life on Earth was possible only because it is at an ‘optimum’ distance from the Sun. This energy — a combination of light and heat — was behind the creation and sustenance of all flora and fauna on Earth. But it did not stop there. In my personal opinion, light played the most crucial part in our scientific quest and discoveries. Optics is the foundation of human civilisation. Only by light are we able to see the natural world and its treasures. We looked up at the source of daylight, viz., the Sun, and the innumerable stars dotting the night sky. We were curious, and tried to make sense of it all and have an explanation of it — first from mythological stories, then by logic and analysis. Who are we, where did we come from, who created these celestial and terrestrial objects? And what does it all mean?