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  Made compound microscope and telescope
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  Discovered cells and called them cork cells because it was like the chambers on a cork
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  Discovered bacteria on his teeth using his home made telescope and called them "animalcules"
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  Studied animals and learned that they are made of cells. He also believed that cells come from preexisting cells
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  Discovered that plants are all mad of cells. He also believed that cells appear from no where but he was proved wrong by Schwann
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  proved that all cells come from other cells
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  people believe that eukaryokes could've come from prokaryokes