Thomas Alva Edison was one of the greatest scientist of the twentieth century. He was a real genius. He is the inventor of electric bulb, the gramophone and many other useful things!
Edison was born on February 11,1847 in a small village of America. The little boy had a very big head and everybody thought that it was due to some disease. But in course of time, this boy turned out to be one of the greatest scientist the world has even produced. He made the world brighter and happier.