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First true inventor of the compound microscope.
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Noticed box like structures in a piece of coark and called them cells from the meaning box-like in Latin.
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Helped disprove the theory of spontaneous reproduction and set the starting point for bacteriology and protozoology.
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Helped disprove the theory of spontaneous reproduction again which suggested that cells all come from preexisting cells.
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First to recognize the nucleus (a term he came up with) as an essential part of a cell.
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Stated that "All living things are composed of cells and cell products." Able to trace very differentiated cells to their origin.
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Realized plants are cells too and that the nucleus is indeed important.
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First to recognize leukimia cells.
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Even better than the best of compound microscopes because it can see very far!
