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Hans and Zacharias Jansen produced the first compound microscope.
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Robert Hooke discovered cells.
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Francesca Redi discovered that calls come from existing cells.
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Anton van Leeuwenhoek discovered single celled organisms.
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Lazzaro Spallanzani discovered that spontaneous generation was incorrect
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Rene Dutrochet discovered osmosis.
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Matthias Schleiden discovered that plants were composed of cells.
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Theodor Schwann discovered plants were made of cells
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Rudolf Virchow discovered animals were made of cells
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Ernst Ruska invented the first electron microscope.