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Empedocles believed that the universe consisted of four elements: earth, air, water and fire
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Leucippus believed that the universe was composed of two elements: atoms and the space inbetween the atoms. Leucippus then passed his work onto Democritus.
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Epicurus believed that the world was made from atoms. He thaught that these atoms were unbreakeable small parts
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First wrote about Epicurus's work in on the nature of the universe
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During the Middle Ages many people studied alchemy. This was the study of turning lead into gold.
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Pierre worked with Epicurus's theory and expanded and created his own theory using many of the same thoughts of Epicurus
