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Zachrias Janswn created the first micrscope
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Robert Hooke observed a honeycomb-like structure in cork cells
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Anton van Leeuwenhoek looks at pond water and finds living cells.
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Leeuwenhoek discovered bacteria and protozoa
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Lorenze Oken discovered a universal science
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Robert Brown further studied cells and saw the center of the cell, the nucleus
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Matthias Schleiden discovers that cells are the building blocks of all plants
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Theodor Schwann figured out that both plant and animal tissues were both composed of cells
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Albrecht von Roelliker discover that sperm and egg are also cells
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Rudolf Virchow added the third part of the cell theory. Virchow also discovered that diseased cells come from healthy cells
