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Roger Bacon (1214 - 1294) used a convex lens as a magnifying glass
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Robert Hooke (1635 - 1703) further developed the compound microscope. He first described cells, as lots of little boxes.
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Described unicellular organisms as 'animacules', from a drop of stagnant rain water. He discovered bacteria from his observations of saliva.
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Discovered nucleus
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They proposed the theory that all living matter is composed of small units called cells
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He proposed that all cells arise from cells as animals come only form animals and plants only from plants
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Described cell division (mitosis)
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Built the first electron microscope
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Built the first x-ray microscope
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The first synchrotron became operational in the USA
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The X-ray diffraction image reveled a crystalline image of DNA which enabled Watson and Crick to reveal the structure of DNA
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Two-photon fluorescence microscope