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Hans Janseen and his son made one of the 1st microscopes.
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Robert Hooke improved the microscope by adding an oil lamp.
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Anton Leeuwenhoek created a simple microscope that could magnify an object 266 times. He was the first to see many single celled organisms.
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The modern light compound microscope was invented.
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The STM (scanning tunneling microscope), was invented. It could magnify an object 1,000,000.
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China develops 3-photon microscope, which is capable of stable imagery of the brain cortex of a mice.