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showed the world the importance of human dissection in anatomy
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invented the first microscope from optical lenses
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Invented the anchor escapement and balance string, allowing clocks to be more accurate
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creates interesting discriptions explaning various strange plants and animals including algea and protists
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created a theory describing nature and all that is in it better than any other theory and has made sense of the things in nature that were confusing
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Discovered that yeast were tiny organisms similar to plants, that fermentation is biological and discovered pepsin, a digestive enzyme
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built the first electron microscope