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Hans & Zacharias Janssen create the first compound microscope
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Robert Hooke uses the word "cell"
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Anton van Leeuwenhoek discovers "animacules" (cells)
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Anton van Leeuwenhoek discovers bacteria
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Matthias Schleiden discovers that plants are made of cells
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Theodor Schwann discovers that animals are made of cells
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Rudolph Virchow says that all living things come from other living things
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Manfred Von Ardenne invents the first electron microscope
