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Hans and Zacharias Janssen produced the first compound microscope by combining two convex lenses within a tube
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Robert Hooke discovered the cellular composition of cork and introduced the word cell to science
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Anton van Leeuwenhoek improved magnification of microscopes by polishing lenses
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Leeuwenhoek created "animacules" or should I say he discovered it.
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Leeuwenhoek discovered bacteria from a sample of saliva from his mouth
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Matthias Schleiden discovered the plants were made up of cells
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Schwann discovered that animals were made up of cells
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Rudolph Virchow stated that all living things come from other living things