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  Hans and Zacharias Janssen Developed the first microscope
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  Robert Hooke Named Cells after they reminded him of dorms that
 monks lived in.
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  Anton van Leeuwenhoek looked through a 1 lens microscope and named the animal looking cretures (bacteria) animalcules
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  Matthias Schleiden looked under a microscope and discovered all plants are made up of one or more cells.
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  Theodor Schwann discovered animals are made of cells
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  Rudolph Virchow Proved that all cells come from pre-existing cells