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Invented the first compound microscope
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He looked at cork which is dead tree bark from the cork oak tree which is made up of dead cells and he discovered cells.
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He proved that spontaneous generation isn't real and was just a dumb thought.
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first person to look at bacteria with a microscope he made himself.
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he claimed that everything inorganic that had access to air and oxygen was alive.
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he discovered that soup that was closed in a container has no micro organisms.
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discovered nucleus.