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He invented the first compound microscope.
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He was the first to observe and describe single celled organisms. He referred to these as animalcules.
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In London England he look at a thing piece of cork through a microscope.
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He descovered that maggots formed from rotting meat.
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Needham said that their was a life force that produced spontaneous generation.
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He discovered that microbes move through the air and they can be killed through boiling.
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He discovered Brownian motion early work on pollinations and fertilisation including reconiseing the difference between gymnosperm and angiosperm.
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He reconized the importance of the cell nucleus. Was the first to formulate the atomic theory of chemistry.
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He discovered Schawann cell in the periphel nervous system, he dicovered pepsinm, the organic nature of yeast, and the invention of the term metabolism.
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He created the first vaccine for rabies
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He was the first to reconize leukemia cells,