People contributed for science to study different aspects of nature to prosper mankind. These genius minds put a keen interest on every phenomenon right from when they were kids. The zeal, passion, dedication, hard work and the effort they put in their work helped them discover something new about the world we live in. There is much to learn from them, from their single minded, focused determination in the face of disbelievers, they serve a lesson in life. Right from the beginning of human settlement, a lot of people came up with ideas, philosophies, beliefs, experiments, research, redesigning of thoughts, and surveys to bring myths to reality. Almost everything of importance, automobiles, electricity, healthcare, and learning is a result of experiments, inventions and discoveries of these intellectuals. Their names are engraved in the sands of time for their work in the welfare of mankind with different inventions. These greatest scientists we have ever seen who changed the world.