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Made the first microscope fully extended zooms 9x
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discovered bacteria, free-living and parasitic microscopic protists, sperm cells, blood cells, microscopic nematodes and rotifers, and much more.
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First to see cork cells through cork
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He discovered the digestive enzyme Eric Weisstein's World of Chemistry pepsin in 1836. Pepsin is an enzyme whose zymogen (pepsinogen) is released by the chief cells in the stomach and that degrades food proteins into peptides.
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Discovered that cells come from each other
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[Investigators](www.sciencedaily.com/releases/2015/10/151016142633.htm) Using stem cells to grow kidneys in the lab
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Making stem cells with skin cells without using embryonic cells
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