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Lens makers Zaccharias and Hans Janssen invent the microscope.
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Robert Hook discovers cells while looking at a piece of cork through a microscope.
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Van Leeuwenhoek improves the microscope and observes living cells for the first time.
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Schleiden states that all plants are made of cells.
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After many attempts and investigations, Schwan states that animals are made of cells.
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Rudolph Virchow states that cells come from pre-existing cells.
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Credit is given to Theodor Schwan, Matthias Jakob Schleiden, and Rudolf Virchow for developing the cell theory.
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German phsysicist Ernst Ruska and electrical engineer Max Knoll construct the Prototype Electron Microscope.
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It is for imaging surfaces at the atomic level. It was developed in 1981 by Gerd Binnig and Heinrich Rohrer.
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The digital microscope is made by a lens company in Tokyo, Japan. It uses optics and a charge-coupled device camera to output a digital image to a monitor.
