Democritus ( 440 BC - 360 BC) is a famous atomic philosopher of ancient Greece . He has been called the richest man of his time. After completing his studies with Lucippos, he traveled to Egypt and Persia, and returned to the country to concentrate on teaching and writing books. He wrote about 72 books. But very few of his writings have been found in Mulakar, and it is necessary to know about him from all the references to him in the writings of others. The philosopher Democritus, a highly rationalist and modern thinker, is best known for his atomic convictions. According to this theory, all matter on Earth is made up of tiny particles , so tiny that they can no longer be split. All these particles are eternal , unchangeable and beyond destruction. Sources: Dhiman Dasgupta , Scientist biography ;