He also played an importqant role in the development of the Western or Sicilian school of Greek medicine.
He cured a plague at the Sicilian city of Selinus and claimed he was a god.
Epicurus - Greek philosopher; founded the system known as Epicureanism.
He studied with followers of Plato and Democritus before opening his school in Athens.
Preoccupied with change, he declared that fire is the central element of the universe, and he postulated a world with no beginning and no end...
Pythagoras - Greek philosopher and mathematician; held that numbers were basic to matter; the Pythagorean Theorem is named for his geometric formulation; developed atomic theory; students of his philosophy emphasized geometrical form as a basic property of atoms; developed mathematical relationships which led to musical harmony.
Love and hate were considered principles of attraction and repulsion that alternately dominated the universe in a recurring cycle.
Empedocles presented a kind of biological theory of natural selection in an imaginative poem, On Nature.
Copernicus discovered the mathematically yet unproven heliocentric solar system.
In his treatise, 'On the Revolutions of the Celestial Spheres' he postulated that the planets, including the earth, revolve around the sun, and that the earth revolved around its axis once every day.
The treatise was translated into English in 1912 by future U. president Herbert Hoover and his wife, Lou Henry Hoover. He became a devoted follower of Erasmus, who wrote a foreward to Agricola's first book on mining and metallurgy (1930).
While town physician of Joachimsthal (now Jachymov, Czech Republic), he became intensely interested in all aspects of the mining and metallurgy industry by which the town thrived and began a 25-year study of the subject, which culminated in hos posthumously published masterpiece.
Plato - Greek philosopher; pupil of Socrates; dealt with the nature of the universe; developed atomic theory of chemical change; ascribed geometric forms composed of bounding planes to the elements of earth, fire, air and water based upon their physical properties; held that elements could convert into one another through rearrangement of bounding planes; used deductive reasoning as a learning method.