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Robert Hooke uses the term ‘cell’ to describe the tiny box-like units in a thin slice of cork
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Antonie van Leeuwenhoek discovers unicellular microscopic organisms
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Rene’ Dutrochet states that all plants and animals are made up of cells
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Theodor Schwann suggests that all animals are made of one or more cells and the cell is the basic unit of structure for all living things
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Rudolf Virchow suggests that all cells arise from cells that already exist
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Ernst Ruska builds the first electron microscope
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Frits Zernike wins Nobel Prize for investing the phase contrast microscope