In the era of ancient Greece to assume the name of Thales have raised, that the whole world is based on water. Thales was the belief that everything in the universe is made of water and anything in the universe to its original–That is, water–Returns. The world's first philosopher Thales (Even before Socrates) Cairo. His hypothesis about the origin and essence of the world although it was baseless and childish and ridicule the next philosophers such as Plato and Aristotle, but he is the first person that attempts to describe all things find a description of the unit. Many philosophers from the time of Thales today, and later became scientists, tried to explain the universe to find such General.