During the Golden Age of Greece, each of the original four elements became associated with two qualities Figure 1, as the following: Air as hot and moist Fire as hot and dry Water

Erasistratus was born c. 325 B.C. on the island of Ceos (Chios), and died c. 250 B.C. He is remembered for his discoveries especially in physiology which were based on human and animal

It is sometimes said that Plato attempted to understand the world through pure reasoning, whereas Aristotle was more empirical and willing to observe. While this is far from the truth, it is perhaps