There are many great scientists, but certainly one of the greatest is Nikola Tesla, who is often referred to as “the man who invented the 20th century”. He is less famous than Albert Einstein or Thomas Edison, but his contribution to mankind is simply immeasurable. Tesla was quiet and modest inventor, a genius who lived and suffered for his inventions and who did not receive the majority of recognition for his work. This mysterious man brought to the world a system of alternating current (what powers every home on the planet), radar, radio, x-rays, transistor, and many more things that we are using in the present. However, as the years pass the significance of Tesla’s inventions are increasingly gaining in importance.