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Go from right to left since the timeline is B.C.
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Classified that all things are classified as five geometric shapes, earth, water, air, fire, and cosmos. this was called the platonic theory.
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He was one of the first to beleive that everything is composed of elements. he also beleived that after a long time, it is impossible to cut anything down to a smaller size.
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First proposed the existence of an ultimate particle. Used the word "atomos" to describe this particle.
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First person to state that matter is made up of four elements
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He felt that regardless of the number of times you cut a form of matter in half, you would always have a smaller piece of that matter
