Through out history, people have tried to find the ultimate substance of which matter is created. THALES MILETUS proposed that all things came from one prime material and that is water. EMPEDOCLE, a Greek philosopher ,proposed tha matter is made up of four elements, namely, earth, water, air, and fire. DEMOCRITUS, a famous Greek philosopher,developed the theory of atoms. He theorized that matter is made up of tiny invisible atoms ( in Greek,atomos means 'uncut'). Aristotle the most famous Greek philosopher, rejected Democritus's idea of the atomic nature of matter. He thought that matter could be subdivided in minute particles. He said that matter could be further and further with each piece becoming smaller and smaller without end.