Albert Einstein is known all over the world as a brilliant theoretical physicist and the founder of the theory of relativity. He is perhaps the greatest scientist of the 20th century. Some of his ideas made possible the atomic bomb, as well as television and other inventions. Alfred Nobel, the great Swedish inventor and industrialist, was a man on many contrasts. He made a fortune but lived a simple life, he was cheerful in company but said in private. A lover of mankind, he never had a family or wife to love him. He was a patriotic son of his native land and he died on foreign soil. He invented dynamite, to improve the peacetime industries of road mining and road building, but he saw it used as a weapon of war to kill and injured his fellow man. During his life he often felt he was useless. He was world famous for his works he was never personally well known, for throughout his life he avoided publicity. But since his death his name brought fame and glory to others.